Hollowed out cedar log tubs set in an ancient towering forest.

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

A self-built castle made by a mysterious man.

Odd outsider art installations surround a Gold Rush-era ghost town.

This frequently-photographed waterfall takes only a short hike to visit.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Towering basalt columns, a creation of fire and ice.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A library of rare occult books in Los Angeles.

Take a drunken tour inside the world's largest known geode.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

This naturally-sourced hot spring is now home to a clothing-optional resort.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Where beautiful signs live on forever.

A hand-built folk art installation covered with messages of God's love.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A dilapidated dock tells the story of Titanic's missed arrival.

Home to items never before seen by the public.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A rare view of a preserved Victorian science museum.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.