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

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

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

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

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

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

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

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

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

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

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

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

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

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

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

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

Small church on top of a huge rock column.

Underground monastery and fortress.

Dedicated to the outnumbered Finnish forces who pushed back Soviet forces during the conflict.

This building featuring Brutalist architecture has a rich media production history.

The charming storybook building now houses a small police museum.

This enigmatic artifact remained buried in a churchyard for years.

This space age health spa looks like a supervillain's lair.

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