Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A massive stone fox oversees a Rotterdam elementary school crosswalk.

Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

Every winter, this former planetarium is transformed into a massive, brightly-lit Christmas ornament.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

This former hydraulic laboratory is now a woodland dotted with old engineering models.

This modest marker near Notre Dame identifies the very center of Paris.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Breathtaking and huge 430 year old maps of Italy.

The celebrated eyesore created by starry-eyed sweethearts.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

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

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A miniature city, once ruled by the Queen of the Netherlands.

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

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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