Old Danish castle immortalized in Shakespeare's Hamlet.

The shiny silver little brother to Copenhagen's Little Mermaid statue.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

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

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

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

The only surviving piece of Copenhagen's 16th-century defensive wall.

Site of the first radio and telephone broadcasting companies in Copenhagen.

The house where a Danish physicist discovered the connection between electricity and magnetism.

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

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

Hans Christian Andersen for the postmodern world.

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.

This demon atop the Notre-Dame de Paris looks utterly bored.

Order a boozy baba au rhum at the oldest patisserie in Paris.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Shop at the 200-year-old store where Julia Child stocked up on copper cookware.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.