This 13th century Gothic brick castle is the largest in the world by surface area.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

Historic slum of Tartu.

This once-derelict building is now one of the most beautiful bookstores in the world.

A medieval setting reimagined into a unique art alley.

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

This extensive collection of vintage Soviet cars is the only one of its kind in the Caucasus.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

This often-missed monastery, set in a scenic mountain landscape, features unique frescoes, fortifications and legends.

This small shrine is dedicated to the designer of the first Russian fighter jet and his brother, who became Chairman of the Presidium of the Supreme Soviet.

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

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

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

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

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

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

A lively circle of dancers in the Georgian capital commemorates an ancient rite of spring.

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

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.

With over 10,000 lights, this engineering marvel lights up the city after dark.