The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

No Gordon Lightfoot song, only a barebones monument to greed.

At the time of its completion, it was the tallest dam in the world.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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 Germany 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.