A sharp bend in a dramatic river canyon cut through red rocks.

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

Experience a charming 1930s version of "infotainment."

From the Difference Engine to the Cray-1, all under one roof.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

This turn of the century masterpiece has a mysterious goaty interloper.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

San Francisco's newly reopened hands-on science museum.

America's largest man-made forest was planted in an effort to bring back the past.

The first declared National Monument in the United States.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

An entire city block built completely out of petrified wood.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

"Where the ducks walk on fish."

The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The only road through the heart of Glacier National Park.