The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This Danish park has celebrated the American independence day since 1912.

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

From buck blood to Theriak miracle tonic, this collection of Renaissance chemist's gear look's like a wizard's pantry.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

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

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

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

Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

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

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

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

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

A whimsical sculpture garden right out of a children's storybook.

This remote island, home to the easternmost point in Denmark, once hosted pirates and a military fortress.

The largest of Denmark's seven mysterious round churches stands on an island in the Baltic Sea.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

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

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

A model memorial to the original Odin Tower, the second highest tower in Europe before it was sabotaged by Danish Nazis.

Plans for this local observation tower were debated for so long, the allocated funds lost value and the design had to be changed.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.