For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.

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

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

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

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

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

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

Colorful and chaotic stacked hotel in North Holland.

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

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Home to three historic ships from the age of Vikings.

The oldest museum in Borneo is a cornucopia of rare taxidermy and human skulls.

A historical convent known for taking in bad luck babies left on its doorstep is now an upscale shopping center.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Pilgrimage site for star-crossed lovers.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

This abandoned five-star hotel is now a five-star urban exploration destination.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.