22. Mendenhall Glacier Caves
Where: Alaska
Why We Love It: Alaska is one of the states people want to visit because of its unique features. If you ever make your way to the state, you will need to stop by and see the Mendenhall Glacier Caves because there is literally nothing else like it in the world.
Unfortunately, it’s a hard place to get to because, in typical Alaska fashion, you need to get through 12 miles of partially frozen caverns before you reach the caves. Fortunately, this is 100% possible and 1000% worth the trip.