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

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

This simple, broken column marks the final resting place of one of America's most famous explorers.

Mysterious library of an infamous financier and spiritual seeker.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

This Tennessee manse was built so opulent that the very utilities doomed it to fail.

Home of an evil witch famous within southern folklore.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

An enormous natural sandstone bridge in Kentucky.

A whimsical folk art garden full of punny pieces and a diorama containing 3,500 toys.

An oversized metal construction of Billy Tripp's moods going through life.

Everyone and everything one man ever loved and lost, now stare into the East for all eternity.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

This museum dedicated to an oft-overlooked support industry features a surprisingly moving brass diorama of a man being saved from a sinking car.