Incredible labyrinth of man made caves.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

A market built atop boats is one of the few floating holiday markets in Europe.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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.

Religious structure known for its sculpted details.

This Romanian village may have been drowned, but it is long from forgotten.

A Romanian church built from one single oak.

This bone-filled cave got its name after they found 140 bear skeletons inside.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

The Natural History Museum that time forgot.

A giant portrait of an ancient king looms over the river.

No one knows who built this strange cave of worship or exactly why.

This once-derelict building is now one of the most beautiful bookstores in the world.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).