What stadiums have you visited?

[Flint1979]

MLB: Add PNC Park in Pittsburgh. I went there for two games in June.

[DandyDan]

Can now add Allianz Field, home of Minnesota United of MLS, to my list, with a plan to finally make it to Target Field in August.

[NWI_Irish96]

I just added American Family Park in Milwaukee. A very nice stadium but I did not appreciate that, at 90 degrees, they did not close the roof and turn on the AC.

[jeffandnicole]

I just added American Family Park in Milwaukee. A very nice stadium but I did not appreciate that, at 90 degrees, they did not close the roof and turn on the AC.

I was down in Miami last month where the Marlins did have the dome closed in 90 degree heat, and the air set at about 50 degrees. It was cold in there!

[Big John]

I just added American Family Park in Milwaukee. A very nice stadium but I did not appreciate that, at 90 degrees, they did not close the roof and turn on the AC.

The only AC there are in the club level concourse and the luxury suites.

[ilpt4u]

All are attended games, except the short Gate peeks at the end

MLB: Wrigley Field, Guaranteed Rate Field, Busch Stadium III, Great American Ballpark, PNC Park, Miller Park, Nationals Park, Minute Maid Park, Oracle Park, Dodger Stadium for current facilities. Busch Stadium II and Riverfront Stadium for past facilities

NBA: United Center

NHL: United Center, Enterprise Center, Madison Square Garden, Honda Center, Busch Stadium III for a Winter Classic

NFL: Soldier Field, Ford Field, FedEx Field, Bank of America Stadium, NRG Stadium, Broncos Stadium at Mile High, Allegiant Stadium for current facilities. Oakland Coliseum for past facilities

NASCAR: Talladega Superspeedway

I have peaked in the gates to Comerica Park and (new) Yankee Stadium

I can now add Dodger Stadium to the list - took a quick trip out to LA a couple weeks back when the Cubbies visited (and dropped 3 of 4) against the Dodgers

And now I can add Allegiant Stadium for the Raiders opener with fans. Edited my initial post also to make it current

[TheHighwayMan3561]

Added Busch Stadium and Kauffman Stadium (MLB) in July.

[roadman65]

Giants Stadium ( now gone), and Shea Stadium ( also gone).

[golden eagle]

Ben Hill Griffin (Florida Gators), Qualcomm Stadium (San Diego Chargers), the Liberty Bowl (Memphis), Philips Arena (Atlanta Hawks), MM Roberts Stadium (Southern Miss), and the former Comiskey Park (Chicago White Sox).

Seen but not visited: Michigan Stadium, Cardinals Stadium (Louisville), Mercedes-Benz (New Orleans Saints and Atlanta Falcons), Soldier Field (Chicago), Bryant-Denny (Alabama), Bobby Dodd Stadium (Georgia Tech), William & Mary (don't know the name, but stayed at a hotel within walking distance), Tiger Stadium (LSU), Vaught-Hemingway (Ole Miss) and Davis Wade (Mississippi State).

[I-55]

Giants Stadium ( now gone), and Shea Stadium ( also gone).

Can I interest you in a trip to Columbus, OH or Bloomington, IN?

[Buck87]

My updated list...

Attended games:

MLB
Cleveland Municipal Stadium
Progressive Field
Great American Ballpark
Comerica Park
PNC Field
Turner Field
Wrigley Field
Oracle Park

NFL
FirstEnergy Stadium*
Paul Brown Stadium
Lucas Oil Stadium (Big Ten Championship Game)

NBA
Rocket Mortgage Fieldhouse

NHL
Nationwide Arena
Joe Louis Arena

MLS
Historic Crew Stadium
Lower.com Field

D1 College Football
Ohio Stadium*
Michigan Stadium
Sanford Stadium (Georgia)
Nippert Stadium* (Cincinnati)
Doyt Perry Stadium (Bowling Green)

D1 College Basketball
Value City Arena (Ohio State)
St. John Arena* (Ohio State)
James A. Rhodes Arena (Akron)

D1 College Hockey
Value City Arena*

Toured or set foot inside of not for a game:
Lambeau Field
Fenway Park
War Memorial Stadium* (Wyoming)
Fifth Third Arena* (Cincinnati)
Anderson Arena* (Bowling Green)

* venues where I have been on the field/playing surface

And then there's a whole bunch of others that I have seen and/or photographed from the outside but have not set foot inside. 

[ethanhopkin14]

I have been to (to watch a game), for baseball:

Arlington Stadium
The Ballpark in Arlington
The Astrodome
Minute Maid Park (I actually went to a game during all three of it's names)
Wrigley Field
Comiskey Park (The one that's now U.S. Cellular)
Bank One Ballpark (Chase Field)
Angels Stadium in Anaheim (Can we just call it Anaheim Stadium already?)
Dodger Stadium
Qualcom Stadium
Petco Park
Oriole Park and Camden Yards
Citizen's Bank Park
Shea Stadium
Yankee Stadium (the second one, not the current third one)
Fenway Park
RFK Stadium
PNC Park
Great American Ballpark
Oracle Park
The Oakland-Alameda County Coliseum
Turner Field
Coors Field

Honorable Mention is Rogers Centre.  I watched an Argonauts game, not a Blue Jay's game

I have been to the outside of:
Progressive Field (Jacobs)
Tropicana Field
Joe Robbie Stadium (when the Marlins still played there and I don't remember which one of the 342 names it had the day I visited)
T Mobile Park
Citi Field
Current Yankee Stadium
Kaufman Stadium
Comerica Park
I watched Game 4 of the 2013 World Series through tunnel from the outside of Busch Stadium
I was inside Olympic Stadium because the Montreal Marathon ended inside the stadium.  This was 7 years after the Expos left.

I have watched NFL Games at:
Texas Stadium
AT&T Stadium
Candlestick Park
Lambeau Field
I have watched a few college games at NRG Stadium

I have been to, but outside:
Arrowhead Stadium
Soldier Field
Lucas Oil Stadium
Lincoln Financial Field
Highmark Stadium
Heinz Field
Paul Brown Stadium
Nissan Stadium
The Superdome
Century Link Field
I saw SoFi Being built
Again, went to Qualcom, The Astrodome and The Oakland-Alameda County Coliseum to see the Padres, Astros and A's respectively, and in all instances the town's NFL team was still located in that town and played in that stadium. 
Invesco at Mile High Stadium
Giant's Stadium
That place in Jacksonville

[skluth]

NFL
Packers - Lambeau Field
Rams - Jones Stadium St Louis

MLB
Cardinals - Current and previous Busch Stadiums
Royals - Kauffman Stadium
Indians - Progressive Field
Cubs - Wrigley Field
Brewers - Milwaukee County Stadium
Nationals - Nationals Park
Twins - Hammond Stadium (spring training)

Minor League Baseball
Round Rock Express - Dell Stadium
Norfolk Tides - Harbor Park
Gateway Grizzlies - GCS Credit Union Ballpark

Hockey
Blues - Both St Louis Arena and Enterprise Center

Also toured both the Cowboys' AT&T Stadium and the Toronto Blue Jays' Rogers Centre

Doesn't really count but my high school stadium was the Packers original City Stadium until Lambeau Field (the new City Stadium) was built in the late 1950's.

[epzik8]

NFL: FedExField, M&T Bank Stadium (for an event registration not a Ravens game), Heinz Field (for the Capitals-Penguins Winter Classic not a Steelers game)

MLB: Fenway Park, Oriole Park at Camden Yards, RFK Stadium (during Nationals' first three seasons), Nationals Park (for many Nats games plus Caps-Blackhawks Winter Classic)

NHL: Capital One Arena (also an NBA venue, but I've never attended an NBA game anywhere)

NCAA: Cole Field House (for a gymnastics event not Terps basketball)

MiLB: Leidos Field at Ripken Stadium (Aberdeen IronBirds games plus a Hawaii-Mexico CRWS game)

NASCAR: Dover Motor Speedway, Pocono Raceway

Driven or walked past or under but not been inside: Philadelphia sports complex (Eagles/Phillies/Flyers/76ers), the current Madison Square Garden (been in Penn Station below it), both old and new Giants/Jets stadiums, Prudential Center (rode past on Amtrak), KeyBank Center (Buffalo not Seattle), Consol Energy Center and Mellon Arena, the Seattle Seahawks' and Mariners' stadiums, Nationwide Arena, Tropicana Field, FedExForum (Memphis Grizzlies), all St. Louis pro venues as of my 2008 visit (Rams/Cardinals/Blues), Giant Center (Hershey Bears), the Frederick Keys' and Bowie Baysox' ballparks, Richmond Raceway, Daytona International Speedway, and what's left of Nazareth Speedway.

[Bruce]

Over the past year, I've seen just about every team play at home in Seattle, except for NFL and XFL.

Attended Events

Soccer:
CenturyLink Field / Qwest Field (Seattle) - MLS (+CCL), NWSL, and USMNT
Olympiastadion (Berlin) - Bundesliga
Stade Saputo (Montreal) - MLS

Football:
Qwest Field (Seattle) - NFL

Baseball:
Safeco Field (Seattle) - MLB

Rugby:
Starfire Sports Complex (Tukwila) - MLR

Hockey:
Climate Pledge Arena (Seattle) - NHL
Angel of the Winds Arena (Everett) - WHL

Basketball:
Climate Pledge Arena (Seattle) - WNBA

Other:
Tacoma Dome (Tacoma) - Bernie Sanders rally

Visited

Soccer:
Banc of California Stadium, Los Angeles FC (MLS)
Mapfre Stadium, Columbus Crew SC (MLS)
BC Place Stadium, Vancouver Whitecaps (MLS)
Providence Park, Portland Timbers (MLS)
RFK Stadium, DC United (MLS)
White Hart Lane, London (Tottenham Hotspur, since demolished)
Westfalenstadion, Dortmund (Borussia Dortmund)

Baseball:
Coamerica Park, Detroit Tigers (MLB)
Petco Park, San Diego Padres (MLB)

Football:
Husky Stadium, UW Huskies (NCAA)
Ohio Stadium, OSU Buckeyes (NCAA)
Qualcomm Stadium, San Diego Chargers (NFL)
Sam Boyd Stadium, UNLV (NCAA)

Hockey:
T-Mobile Arena, LV Golden Nights (NHL)

[Hunty2022]

Minor League Baseball
The Diamond (Richmond Flying Squirrels)

College Sports
Davenport Field (Virginia Baseball)
John Paul Jones Arena (Virginia Basketball)

NASCAR
Richmond International Speedway

Possibly visiting this year

MLB
Nationals Park (Washington Nationals)
Camden Yards (Baltimore Orioles)

NFL
AT&T Stadium (Dallas Cowboys)

[amroad17]

MLB: Cinergy Field (Riverfront Stadium), Great American Ballpark (Cincinnati)
NCAAMBB: Norfolk Scope (Norfolk, VA), Carrier Dome (Syracuse, NY), Fifth Third Arena (Cincinnati), Thompson-Bolling Arena (Knoxville, TN-visited as I had a delivery there in 2004)
MiLB: Met Park, Harbor Park (Norfolk), Champion Window Field (Florence, KY)
IHL: Cincinnati Gardens
NCAAWBB: Firststar Center (Cincinnati-Women's Final Four practices in 1997)
NCAAF: Foreman Field (Norfolk)
Took a tour of and ride around the Indianapolis Motor Speedway.

[ilpt4u]

All are attended games, except the short Gate peeks at the end

MLB: Wrigley Field, Guaranteed Rate Field, Busch Stadium III, Great American Ballpark, PNC Park, Miller Park, Nationals Park, Minute Maid Park, Oracle Park, Dodger Stadium for current facilities. Busch Stadium II and Riverfront Stadium for past facilities

NBA: United Center

NHL: United Center, Enterprise Center, Madison Square Garden, Honda Center, Busch Stadium III for a Winter Classic

NFL: Soldier Field, Ford Field, FedEx Field, Bank of America Stadium, NRG Stadium, Broncos Stadium at Mile High, Allegiant Stadium for current facilities. Oakland Coliseum for past facilities

NASCAR: Talladega Superspeedway

I have peaked in the gates to Comerica Park and (new) Yankee Stadium

I can now add Dodger Stadium to the list - took a quick trip out to LA a couple weeks back when the Cubbies visited (and dropped 3 of 4) against the Dodgers

And now I can add Allegiant Stadium for the Raiders opener with fans. Edited my initial post also to make it current

Totally forgot to update and add Petco Park, after taking in Game 4 NLDS Dodgers/Padres last year in Sunny (actually Rainy that day) San Diego

World Baseball Classic has the brain in baseball mode

[jlam]

NBA/NHL: Add in Ball Arena for me

[frankenroad]

Attended games:

MLB:
- Crosley Field, Cincinnati (including my 7th birthday party)
- Riverfront Stadium/Cinergy Field - Cincinnati
- Great American Ballpark, Cincinnati
- Coors Field, Denver
- Memorial Stadium, Baltimore

NFL
- Riverfront Stadium/Cinergy Field - Cincinnati
- Paul Brown Stadium, Cincinnati
- RFK Stadium, Washington
- Heinz Field, Pittsburgh

NCAA Football
- Nippert Stadium, University of Cincinnati
- Ohio Stadium, The Ohio State University, Columbus
- Memorial Stadium, Indiana U., Bloomington
- Spartan Stadium, Michigan State University, East Lansing

College Stadium for an NFL game:
- Aloha Stadium, Honolulu (2006 Pro-Bowl)

MLS:
- RFK Stadium, Washington

I also got a pre-opening tour of Riverfront Stadium in Cincinnati prior to its opening in 1970.

Just realized I left an NCAA Stadium off the list - Memorial Stadium at UC Berkley, Calif.  Was there to see Ohio State play Cal in 2014 - and there were more OSU fans in the stands than California fans.

[akotchi]

Surprised I have not responded to this before.

MLB
Phillies, both Veterans Stadium and Citizens Bank Park
Orioles, both Memorial Stadium and Camden Yards
Mets, Citi Field
Red Sox, Fenway Park
Cubs, Wrigley Field (tour and team store only)
A's, Oakland Colliseum
Giants, AT&T Park (or whatever it is called now)
Mariners, T-Mobile Park (on May 27)

College Football
Beaver Stadium - Penn State
Veterans Stadium - Temple
Memorial Stadium - Maryland Terrapins

Soccer
(Old) Giants Stadium - NY Red Bulls
MB&T Stadium (Baltimore) - International Friendly
FedEx Field (Landover, MD) - International Friendly
Lincoln Financial Field (Philly) - International Friendly

Interestingly, for all the football stadiums I have visited, I have never seen a professional football game live.

[Dough4872]

MLB: Veterans Stadium (demolished), Citizens Bank Park, Camden Yards
NFL: Lincoln Financial Field (not for an NFL game though, been for college football and a concert)
MLS: Subaru Park
NASCAR: Dover Motor Speedway, Pocono Raceway, Watkins Glen International (rode on track, never been to a race), Richmond Raceway, Martinsville Speedway, Bristol Motor Speedway, Charlotte Motor Speedway, Atlanta Motor Speedway, Daytona International Speedway

[CoreySamson]

Updating my list:

NBA:
Toyota Center (Rockets)
FedEx Forum (Grizzlies and Memphis Tigers)

NFL:
NRG Stadium (Texans and Texas Bowl)

MLB:
Minute Maid Park (Astros)
Petco Park (Padres)

MLS:
Shell Energy Stadium (Dynamo)

NCAAF:
Liberty Bowl (Liberty Bowl, lol)

NCAAB:
Mabee Center (ORU Golden Eagles)

MiLB:
Autozone Park (Redbirds)

Other:
BOK Center [Tulsa, OK] (tour)

[dvferyance]

NBA
Fiserv Forum (Bucks)
NFL
Empower Field (Broncos)
Lambeau Field (Packers)
Lucas Oil Stadium (Colts)
State Farm Stadium (Cardinals)
MLB
Coors Field (Rockies)
Miller Park (Brewers)
Wrigley Field (Cubs)

[jlam]

I just realized I never posted my complete list:

NFL
Empower Field at Mile High (Broncos)

MLB
Coors Field (Rockies)

NBA
Ball Arena (Nuggets)

AHL
Budweiser Events Center (Eagles)

USL1
TicketSmarter Stadium (Hailstorm FC)

Pioneer Leauge
TicketSmarter Stadium (Owlz)

Non-game visits
Moby Arena (Colorado State Basketball, Volleyball)
Canvas Stadium (Colorado State Football)
Nottingham Field (Northern Colorado Football, Track and Field)
Greeley Ice Haus (Northern Colorado Hockey)
South Lake Tahoe Ice Arena (Tahoe Icemen)

Probably missing some non-game visits.