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

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

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

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

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

A rare view of a preserved Victorian science museum.

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

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.

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

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

A beautiful geyser under environmental threat.

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

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The first declared National Monument in the United States.

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

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.

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

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

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

Mysterious rocks that ring musically when struck.

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

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

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