Unrepaired walls from a 1920 anarchist bomb attack.

A bit of retro transportation flair preserved in the world's largest department store.

The best place in the park to test out your throwing arm.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

The miraculous hydrant that saved the Mission District in 1906.

The remains of a 12th-century chapter house in Golden Gate Park.

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

The fifth-longest natural arch in the world, and the longest outside China.

10,000 flowered plants bloom in the City of Roses.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

A hidden subterranean installation offers a view of the sky.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

A massive sea stack famous for its appearance in The Goonies.

The unbelievably opulent home built for an infamous newspaperman.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.