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

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

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

The largest self-built castle in the U.S., six decades in the making.

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

A technicolor place of worship for Elevationists.

Colorado's only active volcano last erupted around 4,000 years ago.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

Eulogizing an unknown man's unusual demise.

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

A rare underwater observatory in the Caribbean that provides breathtaking views of vibrantly colored aquatic life.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

A hidden slot canyon in the southern Nevada desert makes an unexpected oasis and scenic hike.

One of two giant blue cockerel statues erected with an intentional double meaning.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

After the musical legend's death, his memorial was mysteriously graffitied in gold.