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Urban infrastructures are under pressure to provide for growing populations. This series looks at the ingenious engineering to make it possible.

How Cities Work

350 years ago, the Great Fire of London was the most devastating fire Britain has ever experienced. But do we actually know what happened?

From 1600 to the present, Amsterdam, London and New York (The Magnificent Three) have contributed to the birth and development of the “world-city.”

For over four centuries, Paris and Berlin have competed for primacy. Explore the rich and complex history of the two capitals’ relationship.

Scaling the tallest towers across the world, two architects leave the bustling streets to see these extravagant buildings from great heights.

About 12 million emigrants landed on Ellis Island, the ultimate gateway to the United-States of America. Their fates did not always belong to them.

With unprecedented access, visit the World’s Tallest Tower and immerse yourself in the luxurious world of the owner and workers who call it home.

Witness the incredible story of the Eiffel Tower's construction. In its day, the tower was the largest and the most ambitious structure built by man.

See the Mayans in a whole new light: explore the lost citadels of Tikal, a sacred cenote at Chichén Itzá, and a network of tunnels at Teotihuacan.

François Mitterrand commissioned 11 major French structures. Was there a mystical dimension in the creation of these pharaonic monuments?

Angkor Wat, the "City of Temples,” has been steeped in mystery for almost 1000 years. Watch a team traverse Cambodian jungles to explore the ruin.