In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

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

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

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

Denmark’s oldest bakery is home to the 'Wednesday Snail,' one of the best cinnamon rolls on the planet.

An art installation composed of items left behind by beachgoers.

In this museum, visitors are invited to touch the art.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

Quite possibly the oldest love poem known to humankind.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A marvel of Byzantine engineering under the streets of Istanbul.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

A surprising and unconventional mosque hidden in the subsoil of Istanbul.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Homesick Syrian refugees head to this restaurant for a taste of Damascus.

Come for the whole sides of slow-roasted lamb, stay for the regional Kurdish specialties.

This museum was invented in a novel before being made real by the author.