A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

The bones of an old zoo crumbling in the shadow of a new one.

Stalactites and stalagmites in a beautifully lit cave.

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

A miraculous natural phenomenon known as "the spring that breathes."

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

One man's ambition created this psychedelic log home.

Native Americans built this circle of stones, which was used to predict astronomical events.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.