It's believed this golden brick is part of the legendary lost Aztec treasure.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

You can release a young butterfly at this beautiful indoor garden.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

The only castle in North America to ever house European sovereigns.

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

This tiny garden was built specifically to provide a place of peace and serenity away from the busy city streets.

Some charming, but sadly, unloved animal statues call this park home.

A small building that loosely resembles a tooth is appropriately used as a dentist office.

The ruins of the northernmost pueblo in the Americas tell the story of a mixing of native cultures.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

This Wyoming town is fascinated by a particular mythical creature.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

This erect, phallic geological spire wasn't always named so domestically.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

The largest source of fossilized insects anywhere.

The walls, tables, and much of the ceiling in this pizzeria are covered with $40,000 in $1 bills.

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.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

A home covered with elaborate mosaic and other pieces of art.

The ancient remains of this natural fortress can still be found along the Silk Road looking surprisingly preserved.

These excavated burials from the Tarim Basin are wrapped in mystery.

The first declared National Monument in the United States.