A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

Peek inside this sandy mailbox and you'll spot kids' letters to Santa.

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

"Only the devil could play golf here."

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

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

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A natural dome made of volcanic glass in Inyo National Forest.

Towering basalt columns, a creation of fire and ice.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall, but rather lightning.

A restaurant and observation deck built in a unique broadcasting antenna.

Super-heavy Nazi architectural experiment.

Berlin's old airport.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.