The city of Heracleion, which was also known as Thonis, was believed to only be legend for hundreds of years. The city was mentioned by the Greek historian Herodotus, who told of Helen of Troy visiting Heracleion with her lover Paris before the Trojan War.
The city was discovered during a survey of the Egyptian shore at the beginning of the last decade. French researcher Franck Goddio discovered it in 2000 with a team from the European Institute for Underwater Archaeology.
Via Shonda Brock