The first modernist church in Europe.

A glimpse into the festive and private lives of medieval Europe.

Visiting this café is like visiting the Austrian grandma you wish you had.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

An exquisite Baroque church in Vienna's old town.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

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

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

Inside this Krakow church, an explosion of psychedelic color.

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

Christ's blood preserved in a Belgian town.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Eastern Bloc nostalgia, anybody?

A striking symbol of the Bulgarian capital.

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

Europe's second largest ossuary wasn't discovered until 2001.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

Not far from the busy city lie these remains of a time when the world was on fire.