The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Climb to the top of the world's largest seated bronze Buddha.

The watery grave of an impractical idea.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

Home to part of the world’s largest private collection of original manuscripts and documents.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

America's silhouette includes 100 square miles of wilderness jutting into Canada thanks to an old mapmaking error.

The largest Walleye statue in the world calls this Minnesota town home.

This 25-foot-tall statue was built as a protest to a property dispute.

Spectacular volcanic cliffs along the Crooked River invite hiking, rock climbing, and photography.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

From horses to stainless-steel trucks, this iconic Providence burger wagon is one of the oldest mobile diners in the country.

Rumors of the occult haunt this upscale 1920s hotel.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The king of U.S. high points towers over every other peak on the continent.

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

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This historic Victorian hotel has a scandalous history of affairs and murder.

This historic bridge connects Whidbey Island to Fidalgo Island across whirlpool-filled waters.