This failed condo development was reborn as a street art hub.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

A semi-scholarly approach to sex.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

This former lieutenant governor's home is brimming with curiosities.

Experience a charming 1930's version of "infotainment."

The longest living non-clonal organisms on Earth.

There's nothing creepier than a cemetery next to a clown motel.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

Odd outsider art installations surround a Gold Rush-era ghost town.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

An old soap company building now houses one of Minneapolis’s oldest independent non-profit art galleries.

A Perpetually Under construction Park.

When flour explodes, it's not a pretty sight.

20,000 pieces in a Frank Gehry-designed building.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

World's largest Christmas store.

Detroit’s downtown castle is one of the oldest structures in the city.