Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

Colorful and chaotic stacked hotel in North Holland.

The 20-mile causeway that separates the Netherlands from the sea.

Drive past the giant fruit sculptures and up to the window for a menu of fruity treats.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

This massive collection of taxidermy is full of specimens collected by missionaries during their international travels.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

What was once a bustling mining installation is now a bustling hub of contemporary art.

This collection of solar timekeepers includes the world's first digital sundial.

This Belgian palace was long the domain of priests and aristocrats but is now being turned into an art commune.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This abandoned Belgian fortress is purposefully being left to nature.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A rare museum dedicated to a rather overlooked material in the history of fashion.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Hiding the longest subterranean river known in the world.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

Two standing giants remain as a tribute to Luxembourg's metallurgical past.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.