Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

A historic bridge with a lovely acoustic anomaly.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

No one really knows how these old hobby horses got here, but the herd keeps growing.

World War II bunker still standing on the New Jersey beach.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

An outlandish shoe shaped house built by an eccentric millionaire.

A local prank turned town icon.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

This dramatic rail curve was once the target of a failed Nazi attack.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

An abandoned 1920s school with a mysterious history.

A table rock formation that has been intriguing West Virginians for years.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.