The second largest in the world, this massive underground void has its own subway.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

A museum glorifying the life of Stalin, located in the city of his birth.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

Fortified homes of highland warriors that are still in use today.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

The last standing example of an ancient district's teatime tradition.

Unusual building appears to be haphazardly built from randomly piled bricks.

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

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

These Stalin-era industrial 'death traps' hang lifeless above the city

You'll find just about anything in this funky Tbilisi flea market.

The decaying remains of a once-luxurious Soviet spa town.

The first skyscraper to include a Ferris wheel built into the facade.

Fast food feels like fine dining at this award-winning modern Georgian building.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Small church on top of a huge rock column.

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

Ancient rock-hewn town that witnessed key events of Georgian history.