In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The largest collection of two headed animals in the world.

The oldest standing structure in downtown San Diego.

This historic graveyard was partially paved over to create a streetcar line.

It would be a crime to miss it.

Get fishing gear and craft beer at this restaurant on the pier.

One man's quest for the ultimate road trip vehicle.

The freeway that never was.

One of the largest trees of its kind in California.

This giant temperature attraction created some giant electric bills.

The tiniest tiki room in San Diego.

After the oysters have been shucked, and the restaurant's been shuttered, the terrazzo sidewalk from the 1940s is all that remains.

An ode to the friendship between four Pacific Rim countries.

The classic Atari game's iconic aliens have invaded downtown San Diego.

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

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

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

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

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The Giant Lemon of Lemon Grove.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

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

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.