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

An essential stop before plundering, BYO Cutlass.

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

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

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

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

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

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

Tiki luxury on Nob Hill.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

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

This shop specializes in oddities and Victorian-inspired wonders.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Where the lovelorn find a home for their sentimental keepsakes.

The prototype for all Nazi concentration camps.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Catacombs turned marketplace.

Cozy basement bar sports an inventory of over 2,000 beers.

Once the home of a hermetic monk, this cave now houses a small church.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The fairy tale castle of the "fairy-tale king."

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