The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

The Guardian of Tallinn.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

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

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

Morocco's Argania trees are infested with nut-hungry goats.

Vast stretch of tide-pools with a unique Moroccan charm.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Traditional 11th-century outdoor tannery.