Catacombs turned marketplace.

The final resting place of soldiers' loyal canine companions.

This hilarious English intersection is an automotive whirlpool.

Famously misunderstood wonder of the ancient world

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

A man-made island in scenic San Francisco Bay.

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

San Francisco's newly reopened hands-on science museum.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

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

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

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

Furniture tries to escape an abandoned building in San Francisco.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Golden Gate Park's historic collection of plants.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

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

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

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