Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Third time's a charm, or in this case, two testicles are.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Saint Borromeo often prayed in this austere crypt during the 16th century.

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

See what remains of a once grand ancient Roman circus.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

Op-art architecture designed for happiness.

This former insane asylum now holds a pathological anatomy museum.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

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

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

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 world's biggest floating museum in Gothenburg, Sweden.

Hans Christian Andersen for the postmodern world.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

Once a meeting point for great thinkers, and the midpoint of the country.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

A public display of random paleontology.