A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

This abandoned airplane hanger is said to have once been a top secret launch facility.

Bridge that died in war and was resurected.

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

An underground city of salt.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This armored vehicle was built in the local shipyard for use by the defenders of Dubrovnik.

Picturesque basketball courts sheltered by historical defensive walls and with an enviable sea view.

A unique interactive experience of everyday life in communist Yugoslavia—a very different time in Croatian history.

Eat the ultimate iteration of Portugal's most beloved pastry.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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