One thousand trees were planted in Norway to be used to print books a century from now.

Walk 2,300 feet above the ground on the "Troll's Tongue."

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

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

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

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

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

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

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

A beautiful maze marks where three countries meet.

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

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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