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

Tiki luxury on Nob Hill.

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

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

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

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

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

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

A huge musical instrument played by the ocean.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

This elegant arc of a waterfall marks a religious turning point.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

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

Famously misunderstood wonder of the ancient world

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Rummage through this sunken ship, but leave your scuba gear at home.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.