Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Cozy basement bar sports an inventory of over 2,000 beers.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

A five-square-mile slice of Spain on the Mediterranean coast of North Africa.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

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

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

One man’s collection of photography books has transformed into a charming exhibition space.

A shrine of fire worship built on top of a natural flame.

Mysterious hillside with a continuously burning natural fire.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

A gigantic collection of teeny, tiny books.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

You'll find just about anything in this funky Tbilisi flea market.

A spherical "micro-nation" in the heart of Vienna.

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