It's good luck to be mocked by this monkey.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

A wall of chewing gum moonlights as collective art.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Race through the maze, get your name on the sign.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

The grand marquee of this abandoned Hawaiian theater remembers the building's elegant past.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

A much-maligned monument to teetotalism.

Home to items never before seen by the public.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This large midwestern cavern features impressive rock formations and an underground waterfall.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

An astounding collection of medical specimens, including bits of President Lincoln.

FDR's Art Deco hospital tower was hopelessly inefficient.