Lost Cities Revealed
Heracleion, one of the largest trade-port cities in ancient Egypt, was one of 25 lost cities you probably never heard of. John Green tells us that for a long time people believed it was underwater, and in 2013 divers finally started finding artifacts from the city in the Mediterranean Sea. Catch up on more triva-tastic info about lost cities with host John Green in this edition of Mental Floss.
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