The Pittsburgh area seems to have lots of these. There are at least two locations where the Mon-Fayette Expressway south of Pittsburgh runs quite high over other roads and a river. Then there's the Greenfield Bridge over Parkway East, though that's slated to be demolished soon (with a larger structure to replace it?)
And on I-279, there are two really high railroad overpasses on the way to the Fort Pitt Tunnel. I think there's also one over I-77 near Princeton, WV.
When they were under construction, I found the ramps for the Pocahontas Parkway (VA-895) near Richmond, VA to be jaw-dropping tall.