This restored 17th century synagogue is one of the few remaining structures in Morocco’s ruined Jewish quarters.

The designated Jewish quarter in Fez dates back to the 15th century.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

The oldest known university in the world is in Fez, Morocco.

Crumbling necropolis set high above Fez.

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

The other side is actually green.

The beautiful baroque library of the Hapsburg empire.

The most playful of the life-sized statues that make up Singapore's "People of the River."

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Singapore's landscaping project is home to 18 incredible Supertrees.

A Singapore shrine to an unnamed German girl who has become a local deity.

French commune at the heart of conspiracies.

The world's most famous cheese caves.

The world's tallest bridge is also possibly the most elegant.

Walk through living pictures and music in the Cathedral of Images.

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Neo-cave art on the macro scale.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.