Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

One part antique store, one part curiosities hodge-podge.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

At this deceptively beautiful beach, nothing is what it seems.

Erroneously called the world's tallest flagpole, this landmark is devoted to "good neighborliness."

Burping, gurgling geothermal mud pots by the Salton Sea.

An off-grid art installation that encourages its visitors to imagine a world without waste.

A hand-built folk art installation covered with messages of God's love.

The ghostly remains of an accidental sea.

Along a California highway is a kind of Jurassic Park made of metal.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

Catch a glimpse of the elusive Peninsular bighorns right off of the desert freeway.

This historic tower in the California desert promises visitors a "vortex of good vibes".

A UFO scrapyard in the California desert.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

The American rainmaker and a burst dam.

This Pringle-shaped ledge makes for the perfect photo op.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

One of the largest trees of its kind in California.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."