Oldest building in California still in use.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

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.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

The ghostly remains of an accidental sea.

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

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.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

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

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

One of the largest trees of its kind in California.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

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

An ode to the friendship between four Pacific Rim countries.

San Diego's most historic and haunted home.

An inconspicuous footbridge beloved by San Diego locals.

A couple turned their front yard into an artistic masterpiece.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

Lucha Libre (Mexican Wrestling) themed taco shop.

A remarkable medieval structure born from a 14th-century disaster.

Eyam took steps to quarantine themselves and keep the plague from spreading.

One of the U.K's earliest public water supplies is within the "plague village."