Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Where school buses go to die and be reborn as whimsical works of art.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

An unfinished rail tunnel that has since been used to house cheese and bats.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.