At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

European castle ruins in an American state park are actually the product of death and grief.

Erosion and time have created a naturally-formed water park.

Giant granite rocks standing end-to-end like a train of circus elephants.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Some of the oldest exposed rock formations in the United States.

Catacombs turned marketplace.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

Where the author wrote her beloved "Little House" books.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

A commemoration of over 150 of St. Louis's favorite sons and daughters.

This is not your typical jungle gym.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A large visitor's complex and place of remembrance on the outskirts of the DMZ.

South Korea's largely symbolic, barely used gateway to the North.

Secret North Korean passage discovered below the world's most dangerous border.