Canon City, Royal Gorge, World’s Highest Bridge (Colorado, USA)
0We’ve noted before that this bridge, which might well have been the world’s highest when it was built in 1929, has fallen (not literally) to #24 now and probably destined to slide further down the list. Still impressive, though, unlike this old used card mailed in 1942 whose front is OK but whose back is in awful condition, missing stamp and with a jumble of faded writing. Grade: 4