Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A marvel of Byzantine engineering under the streets of Istanbul.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

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

Despite being tiny and rural this Georgian airport looks like a sci-fi boondoggle.

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

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

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

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

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

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

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

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

Small church on top of a huge rock column.

Underground monastery and fortress.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

The deepest metro station in the world.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.