Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

This conservation area is also home to many of the region's desert tortoises.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

Museum dedicated to the art of cutting and polishing stones.

A monument to the art of slicing people open.

This functioning mill was built in the 1970s using parts from several other West Virginia mills.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

Spectacular views await visitors to this lake.

The only road through the heart of Glacier National Park.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

The NBA player's elaborate former home is now a ghost of its old glory.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

A natural history wunderkammer in the middle of the desert.

Community bookshelf of 25-foot-tall book spines.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

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

The first declared National Monument in the United States.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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