The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A little-known park with unusual, half-ruined structures and a mystical energy.

An abandoned Byzantine fortress and notorious prison.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This Parisian café sticks almost exclusively to an ethos of reuse.

Notorious artist squat renovated into legal studios.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This enormous steel tube is the biggest speaking horn in the world.

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

This non-profit theatre in the heart of Brussels is dedicated to hosting independent films.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

Brussels' favorite peeing boy has a sister.

A fantastical bed and breakfast with magically unique rooms.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Sofia's legislative center is continuously reinventing itself.

This building has two facades of clashing architectural designs.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.