A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This airfield is home to a number of retired vintage planes in various states of disrepair.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.

This quirky curiosity shop takes its cues from the world's bazaars.

This former prison is an Art Deco masterpiece with a past full of civil rights flashpoints.

This replica of the Greek structure is in the heart of Nashville.

Beneath the surface, something slithers. And if you find it, prepare to be slimed and glowing.

A vision of beautiful Hindu architecture in the middle of the American South.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.