This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

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

An errant donkey ushered in a new era of mining in Nevada.

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

This abandoned prison castle has become an imposing gallery of graffiti art.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Erosion and time have created a naturally-formed water park.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

Less a museum than a bizarre fantasy world created by artists and engineers.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

European castle ruins in an American state park are actually the product of death and grief.

Curious cave that stays a cool 56 degrees all year long.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

This museum offers an actual time machine back through Colorado's past.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A collection of over 15,000 zines works to preserve DIY publishing culture.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

A downtown park built on top of unclaimed graves.

A technicolor place of worship for Elevationists.