The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

An urban forest overtakes what was the greatest failure of utopic urban housing.

A floating museum that was sunk by a flood and left to rot in the tides.

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

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

This wooded grove of beautiful hand-built stone grottos is a hidden gem within a shuttered Franciscan monastery.

Curious cave that stays a cool 56 degrees all year long.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

This unconventional used book store was once in the news for the surprising act of burning books.

This otherworldly church spire reaches up toward the heavens.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

Atop an active stratovolcano, two lakes separated by a narrow strip of land.

Along the Outback Scenic Byway, adjacent to hot springs, this human-made geothermal feature takes unexplained breaks.

A 36-ton remnant of the last Ice Age now resides amid picturesque vineyards.

One of the most comprehensive collections of historic Native American culture in the country reframes artifacts as artwork.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

Make it an offering.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

The wooden airship was the largest flying boat ever built.

This great stone guardian of the forest is a relic from the land's volatile volcanic past.