The Avenue of Mausolea is a series of grand palatial tombs.

18m long sarcophagus of a constantly growing dead prophet.

Light still pours into the ruins of this ancient Islamic observatory.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

The Laureates here get something even more coveted than a Nobel Prize: free parking for life.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

Only hotel where you can legally launder money.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

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