The first high-tech company in the valley that actually worked with silicon devices.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

A house built from trash known as the poor man's Hearst Castle.

The unbelievably opulent home built for an infamous newspaperman.

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

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

The final resting place of a space program monolith.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Abandoned bridge hidden deep in the San Gabriel Mountains.

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.

Quite simply the largest tree in the world (by volume).

This monster board rode a monster wave to break two world records.