The lost town of Neversink, sunk by New York City.

This Central New York ghost town was once a prosperous railroad community.

A museum dedicated to exhibiting remarkable outsider art.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

Home to items never before seen by the public.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

At 207 feet, one of the world's longest continuous escalators.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

Fittingly, America's museum of architecture is itself a magnificently designed old building.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

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

The oldest continuously operating Catholic school west of the Mississippi.

A rich history stashed behind an unassuming door in the heart of Gold Country.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

One man's eclectic collection of treasures found at sea.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

The small town of Poulsbo in Washington state is the next best thing to the Kingdom of Norway.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.