Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

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

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

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.

When ecosystems collide in the arid Southwest.

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

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The first declared National Monument in the United States.

The largest island on the great salt lake is home to curious creatures and strange stories.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Mysterious meeting place for UFO hunters near Area 51.

A land of debatable treasure.

The most magnificent bottle house in a town strangely full of them.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.