A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

This contorting sculpture is the tallest in San Francisco.

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

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

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

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

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

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

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

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

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

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

Faceless white figures loom over the city from the rooftop.

A huge musical instrument played by the ocean.

The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A naturally beautiful, seemingly bottomless deep blue spring.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.