A medieval church built up to defend its village.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

Something's watching you.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This snug medieval lane is one of the narrowest streets in the world.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

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

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

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

This massive underground salt mine now holds a sci-fi theme park in its depths.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The largest airborne operation in history was launched to capture this bridge.

This vast World War II defense line was the site of a fierce battle.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

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

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

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

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

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

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

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

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.