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

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

Rainbow-hued local gem in Venice.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Home to items never before seen by the public.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Eighteen miniature death-scene dioramas.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

An emporium for the weird, creepy, rare, and just plain gross.

A toxic ghost town sitting atop a massive coal fire.

The site of the climactic scene from the classic horror film is now a historic landmark.

This shop for all your super spy needs hides an educational secret.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The only theatre in the world constructed specifically for sound movement.

The only rotating bar in New Orleans has been slowly spinning since 1949.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

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

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

The seamy, underground secrets of Portland's criminal past.

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

A lush green oasis in the middle of Chicago.