Strange red rock formations that have been attributed to a higher power for hundreds of years.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

Once named the “world’s oldest gas station” due to its unusual construction material.

The water in this preserved area spawns vegetation that gives it a deep green color.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An underground city of salt.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

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

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

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

A moving memorial to the fallen and missing from WWI trenches.

This memorial museum chronicles the apocalyptic destruction of the First World War.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.