Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

A regular looking rock with an unbelievable history.

Bits and pieces from the ill-fated Donner Party's winter cabins.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

When ecosystems collide in the arid Southwest.

The king of U.S. high points towers over every other peak on the continent.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

Monument to the cotton-destroying boll weevil.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

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

The video game-themed street art first popped up in the French city.

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.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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.

Natural sonic phenomenon comes with a grisly legend of murder and blood.