Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

One of Scandinavia's largest mosaics pays tribute to Danish art and science luminaries.

Copenhagen's "other" little mermaid marks the historic location of past sea maid sightings.

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

This striking structure, with balconies jutting out like hedgehog spines, combine cutting-edge design with a playful approach to light and space.

Buried beneath an unassuming Gotland farm was the largest collection of Viking silver, mostly of Islamic origin.

The remains of three Luftwaffe launch pads designed for manned anti-aircraft missiles.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

This "Atomic Egg" appears on the city of Garching's coat of arms.

This unique abacus hanging in the Technical University of Munich actually tells the time.

Four-story slides send people whizzing through the math department at this Munich university.

A miniature model of what will be the world's largest telescope.

This red London phone booth once stood in front of Buckingham Palace and was used by the queen.

At this concrete bunker on the Trondheim fjord, secrets lie above and below the water's surface.

A small square plaque marks a failed assassination attempt that could have changed history.

This poignant tribute to the White Rose movement showcases artifacts related to the heroic anti-Nazi struggle.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

What appears to be an ordinary bridge is actually a rare aqueduct.

This famed marionette theater and museum is bursting with imaginative string puppets.

According to legend a man pooped out the window of this tower to prove that it was straight.

Legend says this sculpture commemorates a brave baker who rescued the city in the Thirty Years' War.

In this truly magical place, rent hasn't been raised since the year 1520.

This fountain tucked away in a park is the focal point of the only "Green Basilica" in Germany.