This art installation pays homage to the famed stones of European lore.

A museum dedicated to the former country.

Designed as a reminder of one of the darkest moments in Austrian history.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

This historic black and white monastery is one of Bulgaria's architectural jewels.

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

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

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

A striking symbol of the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

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

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

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

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

A moving memorial to the fallen and missing from WWI trenches.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

A rare example of World War I trenches from the British front.