A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

A museum dedicated to the former country.

Construction of this bridge was once described as an "act of violence" against a neighboring country.

Piran’s oldest square is laden with history and a beautiful 18th-century reservoir.

When this monument to Slovenia's national poet was erected, it's said to have sparked the ire of nearby church authorities.

Inspired by the Rialto Bridge in Venice, these three clustered bridges were just one part of a Slovenian architect’s grand vision.

A domino effect created with Britain’s iconic telephone boxes.

An artificial lake that opened in 1930 as a seaplane airport, now a park for aquatic activities.

Once an ancient Roman bath, now a hotbed of geothermal energy and a hub for energetic innovations.

Elaborate tile work in this railway station tells the story of Portugal.

Cozy basement bar sports an inventory of over 2,000 beers.

These barriers stand as stark reminders of Northern Ireland's troubled past.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

These murals stand as reminders to the troubled history of this Northern Ireland city.

Northern Ireland's Brobdingnagian stepping stones.

Art and armour fill every inch of this rich kid's Italian villa.

A local legend says the theft of a holy relic explains the hand-shaped bloodstain on the facade of this cathedral.

During World War II, a number of important sculptures and paintings were moved to this castle for safekeeping.

This network of roads is one of the most unique Etruscan creations ever discovered.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

Thousands of coffin-like pillars make up this controversial Holocaust memorial.