If astronomy had a ghost, it would look like this observatory.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The first U.S. town to secede from the Union, only to vote themselves right back in.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

This restaurant is proud to be built atop a burial ground.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.