This historic cemetery was inaccessible for several years due to dozens of land mines.

Bridge that died in war and was resurected.

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

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A 11-foot former president stands on a Kosovo street that also bears his name.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

These engineering masterpieces are a dominant feature of the Belfast skyline.

It was once nicknamed "the most bombed hotel in Europe."

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

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

One of the most photographed locations in the entire city.

A vast Communist-era exhibition space in the Bulgarian capital.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

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