This modest relic, with rich history as a strategic fort through multiple eras.

The oldest working mechanical clock in the world.

Babe Ruth and others planted saplings for a 1930s tourism campaign. The saplings grew as the area faded.

A controversial memorial at the place where Captain Cook met his violent end.

This black shoreline is made up of exploded lava particles.

Watch the newest land on the planet form before your eyes.

Commonly acknowledged as the only public monument to the Devil himself.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

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

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

This remarkably simple jail went over a century without an escape.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

A dentist's hated concrete colossi are now beloved icons of the community.

San Francisco's first World's Fair, dedicated to the wonders of California.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

This mysterious series of teeny guerrilla installations sheds a whimsical light on street art in Oakland.

A tiny survivor of the Donner Party disaster.

The southernmost outpost of the Russian Empire in colonial America.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

A watering hole where the options for seating include a bar, patio, or subterranean cave.

The California capital city once stood 10 feet lower than it does today.