Look closely and you’ll notice that the color changes a third of the way up the tower.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

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

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

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

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

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Colorful and chaotic stacked hotel in North Holland.

A muddy alien landscape that is home to rare species of exotic plants.

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

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

Something's watching you.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

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

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

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.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.