Though they've since been renamed, these two streets hint at Dublin's darker days.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

A remarkably intact castle that once was the largest in Ireland.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Experience what life was like in Ireland during the Viking and medieval ages.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

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

A Baroque mansion with ties to legendary magicians and alchemists.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A surreal statue honoring Prague's favorite literary son.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This doorless 20th-century elevator doesn't stop or slow down.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Monument to a suicide protesting the Soviet invasion.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

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