Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Dentist's hated concrete colossi are now beloved icons of the community.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The land is home to swimming ponies and a legendary 18th-century treasure.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Quite simply the largest tree in the world (by volume).

This replica of the Greek structure is in the heart of Nashville.

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

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

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

A reproduction of earth's many biomes.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The highest bridge in America was built for an almost unnervingly small amount of money.

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

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

When ecosystems collide in the arid Southwest.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

This massive marble memorial was built bit by bit either out of devotion or spite, but at the expense of the surrounding town.