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

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

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.

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

Where beautiful signs live on forever.

Olfactory delights in San Francisco's Botanical Gardens.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A hands-on traveling collection of the innovative devices of yesteryear.

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

A museum befitting the city responsible for supplying the majority of the world's LSD.

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

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

An underwater city for the dead.

The secret city built by the Manhattan Project.

Home to items never before seen by the public.

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

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

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

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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

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