Radioactivity still cause for concern at this urban explorer's paradise.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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

The blinking light atop the iconic landmark has been sending secret messages for decades.

60 feet of towering steel balances gracefully.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

Come crisp December nights, this fairly plain neighborhood becomes a holiday dream world.

The final resting place of a space program monolith, soon to be unveiled again to the public.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Historic funicular railway, believed to be the shortest railroad in the world.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Rainbow-hued local gem in Venice.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

One man's homage to the sun continues to grow like a glass fractal.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

World's largest collection of serial killer artwork and other macabre exhibits.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.