See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Museum devoted to the artificial language of Esperanto.

Op-art architecture designed for happiness.

Handsomely crafted representations of our round planet.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

An exhibit of endangered species confiscated from smugglers and passengers.

The world's longest and deepest train tunnel.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

Zurich's evolution museum hosts a unique collection of skeletons among its natural history treasures.

This eclectic architectural gem played witness to Zurich’s colonial past.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Brace yourself for the slowest, scariest, most spectacular drive, down the Drakensberg Escarpment.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.