Krakow's own version of the Hollywood Walk of Fame.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

A former suicide bridge is now accumulating symbols of love instead of a body count.

Sound travels strangely in this underground whispering gallery.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Celebrating the Swedish ship used in the first Arctic expedition to navigate through the Northeast Passage.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

There's something in the air as history repeats itself at this museum dedicated to the Swedish pop band.

A Soviet era flat that refused to conform to the dull gray standards.

This hidden green space is the city's second largest conservatory.

This Stockholm art museum integrates many of its pieces into the surrounding outdoor areas and natural landscape.

Crystal chandeliers brighten up this dark underpass.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

An entire shopping mall and industrial terrain named for the time the king of Sweden's car went into a ditch.

From a distance, this structure looks like an ordinary office building but a closer inspection reveals a unique facade.

A statue that stood at the center of a long copyright battle.

18th century opera in its original splendor.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

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

A public work of art that also provides some relief from the summer heat.

A hands-off space for graffiti artists to hone and display their skills.

It was meant to help transport wounded soldiers to a secret underground hospital.