A museum filled with tiny, adorable versions of the mighty Royal Danish Navy.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

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.

One of Ireland's lesser-known megalithic structures.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

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

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

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

A brutalist gem towering over the heart of Milan.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

The secret medieval communication system will whisk your words above the noise of the crowd.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Museum preserving torture methods from the past.

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

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.