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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Monks in the empyreal Alazani River valley have preserved their 1,000-year-old winemaking tradition.

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

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

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

Small church on top of a huge rock column.

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

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

Underground monastery and fortress.

Hungarian self-built castle.

300 years of pharmaceutical history on display.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

Electrical curiosity museum housed in an old transformer station.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A two-way chairlift system between Zugliget and the highest point in the city.

This hidden art nouveau gem was designed by an architect in search of a national style.

A Hungarian pharmacy museum with a box full of mummy powder.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Museum dedicated to the terror regimes of Hungary.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.