An artificial hill and apparent calendric structure built in the Early Middle Ages immortalizes a legendary Polish princess.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

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

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

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

One of the American Southwest's most extensive collections of Navajo rock art.

Legends surround this jagged rock formation in the New Mexico desert.

See massive fossils that are over 200 million years old in northeastern Arizona.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

This bird-shaped rock formation defies gravity, time, and classification.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.