Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

The cluster of boulders near Fort Irwin is covered in military insignia.

This historic bridge has weathered fires and floods and still stands, now abandoned, where it has stood since 1874.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

Burping, gurgling geothermal mud pots by the Salton Sea.

The crumbling ruins of this southern American fort have survived storms, war, and cults.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

This abandoned motel doesn't welcome guests anymore, but decay and a creepy atmosphere still call it home.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

An abandoned concrete jungle surrounded by a lush park.

A historic ruin just 20 feet away from a busy highway onramp.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

A hidden gem of a saloon in the middle of a ghost town.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

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

An underwater statue of Christ blesses the depths off Key Largo.

A few dilapidated structures are all that remain of this deserted former silver mining town.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

This historic mini-suspension bridge was swept away once but is now here to stay.

This historic tower in the California desert promises visitors a "vortex of good vibes".

The highest point in Wisconsin is capped by two towers that are not as mythic as Tolkien's but provide much better views.

The oldest still-operating tavern in the United States was once owned by a pirate.