Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

Haunting and beautiful trees, doomed to die.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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."

Thousands of turbines whir at the origin of North American wind power.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

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

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

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

Towering basalt columns, a creation of fire and ice.

Quite simply the largest tree in the world (by volume).

The largest earthwork effigy in the world.

An office built to look like a giant basket.

A historic presidential getaway on the continental United States' southernmost island.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

"We Seceded Where Others Failed."

Former villa and estate of James Deering developed to preserve native tropical forests.

A monument celebrating the idea of reaching inaccessible places.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

This historical swimming pool near Miami is emptied and refilled each day with naturally filtered water.

A community of collapsing homes more than a mile out from the Florida coast.