A huge musical instrument played by the ocean.

Home to one of the world’s largest collections of model yachts.

The legendary statue-hating superintendent of Golden Gate Park is honored with... a statue.

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

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

These subterranean storage areas hold emergency water reserves.

27-room home built with the fortune of a sugar magnate.

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

Radioactivity still cause for concern at this urban explorer's paradise.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

The remains of a ruined mansion memorialize the 1906 earthquake.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A winding path built in secret on the edge of the continent.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

A charming flea market shop dedicated to retrofuturistic apparati.

An antique curios dealer and hybrid taxidermist.

The storefront of a ramshackle Parisian puppet theater.

This 18th-century sundial was designed to calculate the date of Easter each year.

This Parisian gem is one of the most incredible ethnographic museums in the world.

What looks like a normal building is really a hollow facade hiding a subway vent.

One of the oldest masonic museums in Paris.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

BDSM, 1930s Style.