I remember GSVing in Central Florida several years ago where there's some decent hills, and I swear I found a road there with a massive hill + climbing lane that looked like it belonged in NC's foothills or some other place like that. I haven't been able to find it since. I randomly thought back to that and wanted to see other examples of climbing lanes in normally super flat states/places.
To start off with, here's an example from Chattahoochee, FL:
https://www.google.com/maps/@30.7047058,-84.8515735,3a,50.1y,270.84h,87.03t/data=!3m6!1e1!3m4!1sCBYKZ17aaMalBYXtzA-WqQ!2e0!7i16384!8i8192
Amusingly the Nacimiento-Ferguson Road in Los Padres National Forest used to have a primitive climbing lane on the steepest part of the ascent out of CA 1 near Gorda in Big Sur. Basically the road "expanded" from a single lane to two at the highest part of the uphill incline. Basically all it consisted of was someone from the Forest Service painting white center stripes. I have no idea if is still there but it was in 2017 (I'm facing the opposite direction).
https://flic.kr/p/VNvn5n
For reference the Nacimiento-Ferguson Road was heavily fire damaged and is being rebuilt.
The Trans-Canada Highway across Newfoundland is mostly a two-lane highway that periodically has what would look to many people like climbing lanes on relatively trivial hills but are really intended mostly as the primary travel lane with the left lane being a passing lane to make it easier for people to get around trucks, RVs, etc. Sometimes on the flatter portions of these segments the other direction will be a single lane and will have a passing zone coupled with a sign saying "Yield Centre Lane to Oncoming Traffic" or similar.
The City of Fredericksburg VA had one:
https://goo.gl/maps/bQJsSmLFAyfDjpAc6
This strecth was recently rebuilt as 4-lane divided to the top of the hill.