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

A quirky collection flush with information on commode culture from ancient times to modern day.

The deepest metro station in the world.

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

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

A "miracle" that seems to produce more holy fistfights than holy revelations.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

The reconstruction of this prominent building fulfilled a long-written command.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.

A black cat protests the City Guild in Riga's Old Town.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.