This historic observatory contains the world's oldest refracting lens telescope.

This grim museum collects artifacts and evidence of some of the most sensational antipodean crimes.

Come for the flowers, stay for the bats!

An abandoned railroad tunnel is now filled with bioluminescent bugs.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

After funding was cut for a memorial to the Danish author, the sculptor had his statue ceremonially lowered into the city harbor.

The final resting place of one of the brightest physicists of the 20th century.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

A symbol for the opposition to nuclear power around the world.

Old Danish castle immortalized in Shakespeare's Hamlet.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Step back in time at this 19th-century kiosk.

Eat the ultimate iteration of Portugal's most beloved pastry.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A museum dedicated to the former country.

A pair of connected skyscrapers form this symbolic gateway.

Arguably Belgrade's only example of pure Art Deco architecture.

Belgrade’s oldest restaurant has a rather unusual name.

This small bronze pyramid marks the center of Belgrade, but some say it is a Masonic symbol.

A collection of noses tucked inside an art museum reveals how times have changed.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

This red light district plaza memorializes the Fab Four and their historic connection to the area.