Quirky Welsh observatory unites art and science.

Macabre astrological automaton clock dating to the late 1400s.

Spitfire airplanes with butterfly wings hover over Prague’s skyline.

A mocking tribute to the past and modern leadership of Prague.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

People have been placing babies on these lilies for photoshoots since the Victorian era.

A statue commemorating 'the greatest inhabitant of Amsterdam of all time.'

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

Colorful and chaotic stacked hotel in North Holland.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Where a neoclassical sculptor rests at the heart of the museum devoted to him.

A bridge that has seen many reiterations over its lifetime.

The location of the world's first telescope demonstration.

A public display of random paleontology.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A futuristic, brutalist masterpiece that is also strangely prison-like.

A 11-foot former president stands on a Kosovo street that also bears his name.

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.