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 stately structure has been abandoned for half a century.

A world-class observatory in the California desert.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

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

Built for an exposition in 1915, these horticultural displays have stood the test of time.

A hidden courtyard houses early 20th-century plaster masterpieces.

A blast from the past in central San Diego.

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

A dramatic coastline that’s home to a rare pine tree.

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

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A local landmark with generations of spraypainted messages, and more being added each day.

A humid oasis combines recreation with exploration in a unique underwater cavern.

The Gulf’s longest fishing pier is a year-round paradise for catch-and-release whoppers.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

The second-tallest water tower shaped like a peach in the American South.

A miniature city built by a single hunchbacked monk.