This eatery transports diners to a place that no longer exists: East Germany.

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

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

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

Early prototype for Frank Lloyd Wright's Guggenheim.

A man-made island in scenic San Francisco Bay.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

A hidden subterranean installation offers a view of the sky.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

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

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

Tiki luxury on Nob Hill.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

Walk the whole Mississippi River!

It may take some time to locate, but it's sure to warm even a heart of stone.

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.

For decades these polar bears have roamed all around a Nashville neighborhood.

Victorian-era Egyptomania left its mark on this Nashville landmark.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This replica of the Greek structure is in the heart of Nashville.