World War II-era Nazi compound nestled in the Santa Monica hills.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

The eccentric mansion of one of the most popular horror authors of modern times.

An old dining hall now serves up ghost stories for lusty locals.

The strange, ritualistic-seeming 100+ year old basement of a New Hampshire undergrad society.

House used in the 1971 horror film "Let's Scare Jessica to Death."

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Dive bar built out of the remains of a whaling ship.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

A mysterious drive-in nestled in the forest that leaves little to the imagination.

A mysterious castle built as a monument to lost love.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

A strange house built only at night, with rumored mystic inspiration.

This unusual building straddles two countries.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

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