The fossilized remains of ancient California redwoods.

Centuries of biking history are nestled in the shadow of the birthplace of contemporary mountain biking.

George Lucas donated this park to honor the birthplace of his two biggest movie franchises.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

Concrete strongholds stand guard over the Golden Gate.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

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

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

This rustic old building is said to be the most photographed barn in America.

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.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

One man's quest to save his town with a trail of record-breaking sculptures.

Two insane asylum bodies embalmed by an amateur.

A winding district gerrymandered into the shape of a mantis.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

A secret greenspace hides atop a Capitol parking garage.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

This groundbreaking 16th-century map is known as "America's birth certificate."

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.