A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

A massive collection of petroglyphs dating back some 40,000 years.

Resonant stone, that has been played since prehistoric times.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

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

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

A unique museum dedicated to culture and artistry of carpet weaving.

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

Mysterious hillside with a continuously burning natural fire.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

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

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

An ancient burial ground believed to have been used for ritual sacrifice.

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

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

An incredibly salty lake inside the crater of an extinct volcano.

The (fictional) address of Sweeney Todd's bloody barbershop.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

The last vestiges of a magnificent Victorian-era train station can be found in this pub.

This sprawling, Brutalist estate feels like a city within a city.