This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This former steel and coal plant is now a neon-lit industrial fantasia.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Once the home of a hermetic monk, this cave now houses a small church.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

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

The modern birthplace of Irish freedom.

An abandoned underground bathroom is now a space for public art.

Largest illuminated advertisement sign in the world.

Metro station with a claim to rock n' roll fame.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

When the rain falls, this drain system turns into a musical instrument.

Macabre astrological automaton clock dating to the late 1400s.

One of Australia's largest collections of preserved animals is on display in a historic theater.

A little sculpture with a large wardrobe.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

This single room has survived the centuries with almost no deterioration.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.