French prisoners carved these boats from the bones of their meat rations.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

This museum offers an actual time machine back through Colorado's past.

The world's tallest turtle riding the world's largest snowmobile.

This museum is a full-size replica of an original church constructed during the 13th-century.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

One of the largest trees of its kind in California.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

See massive fossils that are over 200 million years old in northeastern Arizona.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.