Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Try not to get slimed in Tribeca.

A 140-year-old castle with underground caves hidden in San Francisco.

A bizarre house filled with an astounding array of collections.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

On Japan's Tashirojima Island, cats are king.

Dramatic river bend surrounds a natural red-rocked pedestal.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

France's most famous cemetery, with some of its most curious tombs.

These fantastically named natural pools look like something out of a Scottish myth.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Beloved bar home to musicians of all eras and reputations.

The subtle science of a master molecular gastronomist.

A crumbling hospital from the 1850s on Roosevelt Island.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

Over 50 historic windmills whir away at this outdoor museum.

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

No matter what the plaque under this massive legume says, this is not the world's largest peanut.

A detached cement mixer has been transformed to resemble a relic from some obscure NASA mission to Oklahoma.

A natural rock formation believed to be a cure-all.

Very likely the only museum in the world that celebrates the glory of the humble banjo.

One of the best examples of Art Deco architecture in the United States.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.