This Parisian fountain is a little bit fantasy and a little bit nightclub.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The history of radiation is on safe display at the foot of a radiation science laboratory.

The personal library of the founder of modern neurology is open to visitors.

Personal garden filled with mosaics made of recycled garbage.

The abandoned fishing village was swept right into the sea.

A self-built mosaic house and sculpture park.

An intricately decorated tiny place of worship.

The first island in the world designated a light-pollution-free astronomical observation point.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Europe's largest community of crocodiles and alligators.

Folklore and history carved into Brittany's coast.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

Got apples?

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Abandoned railway line circling the city of Paris.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.