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

When the Soviets destroyed the historic Armenian monastery they somehow left its bell tower intact.

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

Transmission tower outfitted with large crossbars that dampen wind-induced oscillations.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

A landmark in the history of technology and computing is hidden in a tiny Baroque chapel.

The unusual sculptures are believed to be powerful political symbols.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

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

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

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

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

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

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

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

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

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

Many famous English poets including Elizabeth Barrett Browning are laid to rest at this Swiss-owned cemetery in Florence.

Iceland's tribute to its thankless civil servants.

The oldest hall in Iceland was written of in the Sagas and features a centuries-old escape tunnel.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Climb right into the heart of this colorful Iceland volcano.

Medicinal spa created with the discharge from a geothermal energy plant.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.