A library of rare occult books in Los Angeles.

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

A slice of central Asia in the middle of Berlin.

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

A hip bar decorated with walls of golden skulls.

The rocks in this arid basin leave trails of movement behind them.

Two stunning 17th-century libraries and a cabinet of curiosities.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

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

Where manatees are the snowbird vacationers in these balmy Florida springs.

A beautiful geyser under environmental threat.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

The first declared National Monument in the United States.

Started as a kitchen garden, now the second largest botanical garden in the world.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

Enormous lake at the bottom of a unique cave system.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A winding path built in secret on the edge of the continent.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.