A giant Troll lurks under one of Seattle's oldest bridges.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The final resting place of New Orleans' most famous voodoo priestess.

A layered tribute to the work of mosaicist Isaiah Zagar.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The first declared National Monument in the United States.

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

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

Try not to get slimed in Tribeca.

A walk through the historic city center, under the streets of Seattle.

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

A library and shop devoted to the body, mortality, and bringing to light forgotten or neglected histories

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

Towering basalt columns, a creation of fire and ice.

A sharp bend in a dramatic river canyon cut through red rocks.

Tucked in the back of this amazing antique store is an important piece of medical history.

A bizarre house filled with an astounding array of collections.

A toxic ghost town sitting atop a massive coal fire.

Most-visited and most-photographed slot canyon in the American Southwest.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The world’s first penitentiary, meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.