The downfall of the powerful Maya city of Palenque in southern Mexico continues to mystify archaeologists today; now, investigators gain rare access to explore lost tombs to reveal the truth behind this legendary city and the mystery behind its enigmatic queens. 

The ancient Sumerian city of Nippur is one of the richest archaeological sites on Earth, but decades of conflict in Iraq have prevented its exploration; now, experts gain rare access to finally uncover the mysteries behind the most sacred city of Mesopotamia.