Fortified homes of highland warriors that are still in use today.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Ancient rock-hewn town that witnessed key events of Georgian history.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

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

Building Men of War and Indiamen from Holland's Golden Age.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

The birthplace of most all of Europe's space missions is here on the Dutch coast.

The largest 19th century panorama in the world still in-situ.

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

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

Home to the world's oldest functioning orrery.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

A miniature city, once ruled by the Queen of the Netherlands.

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

The world’s first interactive human body museum also serves as a chair for a giant orange man.

Incredible labyrinth of man made caves.

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

A grassy pyramid named after a French battle.

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

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.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

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