A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This memorial museum chronicles the apocalyptic destruction of the First World War.

An astounding collection of taxidermy, fossils, skeletons, and even a few strange live beasts.

Museum in a swimming pool where the water still flows.

Atop this library is one of the most beautiful green spaces in Warsaw.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A statue honors the children who fought Nazis in Poland.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

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

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

A beloved local artist has been honored with this statue of a man emerging from a toilet.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

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

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

Op-art architecture designed for happiness.

It houses the remains of a 17th-century version of the Titanic.