A scattered trail of street art adds a pop of color to the city's stark structures.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

An artist has turned what most people would consider a bathroom nightmare into a work of political art.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

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

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The world's northernmost aquarium looks like it has fallen over.

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

The Andean town where every single building is decorated with a brightly colored frieze.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

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