A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A true Valhalla for cactus and succulent lovers.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

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

Peek through a transparent pyramid and drink in the mountain made of books.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

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

The ruins of a castle sat decaying in this park for years before a massive renovation restored this area to its past beauty.

No shoes allowed on this trail, which is designed to be experienced barefoot.

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

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

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

A once-magnificent collegiate church is falling into ruin.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

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

One of the deepest indoor swimming pools in the world.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Lavish royal estate punctuated with heated greenhouses.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

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

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

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.

An old-fashioned school with interesting grounds and deep history, including the original Mito Castle gate.