For one day every month Barcelona's Estació de França transforms into a market for model trains.

Giant topiary dog once played a role in a terrorist bomb plot.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

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.

The silly symbol for an underground protest group is now scattered around the city.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

An eerie collection of the surviving structures from a past celebration of the future.

The best place in the world to buy tinned fish.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

A statue honors the children who fought Nazis in Poland.

Did Gustav Eiffel design this enigmatic metal building?

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

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

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Baroque celebration of the end of the Great Plague of Vienna.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Mysterious craters may have been home to an ancient cult.

Romania's triumphal arch looks out over Bucharest.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.