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 only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

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

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

A tunnel with windows, so you don't miss out on the impressive views.

Three hundred years of preserved Spanish colonial history in San Antonio.

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.

A tower that pays homage to local sailors who perished under the waves.