Thonis-Heracleion was one of Egypt’s most important trading ports when it was founded at the mouth of the Nile River around the 8th century BC. The city extended as a web of buildings and canals around a grand temple until a series of natural disasters led to its flooding in the 8th century AD. Rediscovered in 2000, the city sits a couple of miles off of Egypt's Mediterranean coastline at the bottom of Aboukir Bay, and it's full of gold coins, towering statues (that walk like Egyptians, naturally), hieroglyph-inscribed slabs, animal mummies, and shipwrecks.