The oldest standing structure in downtown San Diego.

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

This little blue house pokes out over the campus of UC San Diego, seven stories high.

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

The Giant Lemon of Lemon Grove.

This San Diego museum, housed in a former Navy training facility, is dedicated to preserving women’s historic achievements.

These colossal desert barcodes have been fine-tuning spy satellites for decades.

The quirky salon doubles as a retro museum run by the world's leading "hairstorian."

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

Outposts of this restaurant chain were shaped like jaunty chapeaus.

This 1920s masterpiece of French Quarter architecture hides a secret tunnel used by Albert Einstein.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

Formerly Fire Station No. 27, the museum is a hidden gem in the heart of Hollywood.

The only standing town in the United States that early Chinese Americans built for themselves.

Hidden in one of the skyscrapers on Bunker Hill, this museum features an 1895 stagecoach and peers into California’s gold-lined history.

A macabre tour of Hollywood’s deadly history.

Inside this clubhouse is a cinephile's paradise.

Historic house-museum dedicated to the revolutionary gay graphic artist Tom of Finland.

The last orange grove of the San Fernando Valley is owned and protected by CSU Northridge.

The best Tiki bar in Las Vegas.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

This historic train station has been converted to a locomotive themed hotel.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.