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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

A little bit Wonkatania, a little bit pink elephant.

A 131-year-old wunderkammer of Texas history.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only surviving prototype for Buckminster Fuller's house of the future.

The only surviving prototype of Buckminster Fuller's revolutionary car.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

The plague quarantine island home to the alleged "Vampire of Venice."

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

A bit of retro transportation flair preserved in the world's largest department store.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.