TV Guide PBS America Sunday

The team use drones to explore one of the world's largest ancient water systems and ancient weapons, hidden battle carvings, and traces of a colossal iron industry reveal the truth behind the awesome power of the Khmer military. Part two of two

Part one of two. Archaeologists unearth the remains of the ancient civilisation from beneath Mexico City, digging deeper than ever before to find out who the Aztecs were and how they built their remarkable empire. The first episode features an attempt to build a replica of a pyramid, as well as investigating the mysterious pyramid ruins being unearthed in the heart of Mexico City and a journey into a set of underground tunnels that have lain undisturbed for centuries

Archaeologists investigate the discovery of more than 100 ancient skeletons buried in a hillside outside Mexico City. They also attempt to decode the secrets of a mysterious ancient manuscript to reveal the secrets of Aztec ritual sacrifice, and finally manage to complete their groundbreaking experiment to build a replica Aztec pyramid

Exploring the epic battles, intricate designs and world-altering legacies of the great fortresses in the Mediterranean. Featuring Crusader forts in Rhodes, Malta and the Levant, Ottoman forts in Greece, Venetian forts in Crete, Moorish forts in Spain, Portugal, Morocco and Algeria, and Portuguese and Spanish forts on the North African coast