A French explorer makes an unprecedented discovery in Alexandria's harbor that could reveal vital new information about Cleopatra's reign and her connection with the goddess Isis.

In the heart of southern Africa lies a mysterious forgotten city. Known as Great Zimbabwe, it was once home to 20,000 people. Its imposing walls are forty feet high and sixteen feet thick. Who built this huge metropolis Why is it filled with gold and treasures from around the world And why doesn't anyone know its story Today, after five centuries, archaeologists are finding new clues about this sophisticated civilization.

How the unique partnership between the United States and France made the iconic monument possible.

A terrifying discovery: A skeleton dating from 1650 buried with a sickle across her neck and giant padlock on her toe - double protection to keep her from rising from the dead. Whoever buried her was petrified of her returning from the grave. All the evidence is she was buried as a vampire. She's found wearing a silk cap with a gold headdress. Inside her mouth, which was green and possibly the result of poison, is a leather pouch with writing on it. And she's not alone, ultimately, more than 50 deviant burials around her. Who was she? What did all of the burial rituals mean?