A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Commonly acknowledged as the only public monument to the Devil himself.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This ship offers visitors the chance to spend the night aboard a former floating hospital for fishermen.

A beautifully eclectic mix of architectural styles.

The history and future of cannabis.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

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

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

A statue of the second-tallest Dutchman in history.

A huge teapot illuminates a home for the elderly.

A giant floating rubber duck-bunny painted with a different design every year.