This man-made mound monument was built out of soil from all across the Polish empire.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Condemned US Navy seaplane control tower turned officers’ club sits atop Yerba Buena Island.

An invitation-only museum of items natural and bizarre, arcane and exotic.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

Furniture tries to escape an abandoned building in San Francisco.

A bronze tribute to a legendary Californian, the self-proclaimed "Emperor of the United States."

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

One time home to turn of the century explosives, now hidden under the Bay Bridge.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

These subterranean storage areas hold emergency water reserves.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

A monumental cross hides in the trees in Golden Gate Park.

The rustic cabin-like decor of this Arts and Crafts-style church reflects the love of nature central to its little-known theology.

The largest whiskey stash on the West Coast survived the 1906 fires--but not without heroic effort.

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

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

Guns that have been defending San Francisco since 1904.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

The taxidermied remains of the "last wild grizzly bear in California" and of the symbol of the state of California.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.