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

These elevated trucks were put in place as a middle finger to The Man, but are now considered folk art.

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

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

A winding, cliffside stretch of road overlooking the Delaware River.

Whimsical artist house in the New Jersey woods.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

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

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.