The symbol was surreptitiously built into the river bank by German prisoners of war.

A lonely beacon, precariously perched atop a remote sliver of rock.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A rare example of World War I trenches from the British front.

After serving in Vietnam, Korea, and even a stint in the Turkish navy, the unique ship is now open as a museum.

A tall karst islet popularized by 007.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

The show's fictional Korean medical camp was created in the Santa Monica hills.

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A museum dedicated to the alleged Roswell Incident.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

Ohio's 19th-century communist micro-society.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

What is it about mushrooms that makes people wish they lived inside of them?

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Where beautiful signs live on forever.

The largest earthwork effigy in the world.