This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

This abandoned boat was left in place thanks to its rotting beauty.

Once the gateway to the utopian dream-village of a Civil War embalmer.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

The largest drain hole in the world.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

This contorting sculpture is the tallest in San Francisco.

Concrete strongholds stand guard over the Golden Gate.

A huge musical instrument played by the ocean.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

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

Built for the 1962 World Cup, this fully functioning botanical clock is still ticking.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

Fortified medieval tower house with lovely roof garden.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

'Cause the fence start shaking, the earth was quaking.