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

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

Four alabaster giants contemplate the tides on the shore of Denmark.

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

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

Old Danish castle immortalized in Shakespeare's Hamlet.

A natural wonder in south Denmark.

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

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

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

Copenhagen's celebrated theme park and gardens.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

A miniature city, once ruled by the Queen of the Netherlands.

Colorful and chaotic stacked hotel in North Holland.

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

A men’s restroom became a sandwich shop.

This indoor ski resort has a mountain contained inside a mall.

Once a black market electronics marketplace, now an otaku shopper's paradise.