For those who know how to interpret its secrets, a sunken ship has many tales to tell. The stories of the lives of those aboard its last voyage are revealed in the objects scattered around the shipwreck. Then there are the stories of the many ocean creatures that have found a home inside the broken hull.

Two shipwrecks, separated by two thousand miles and two centuries, share a common history of life, death, and rebirth. The first is the Henrietta Marve, a slave trader that sunk off Florida in 1700. The second, an elegant steamer with crew members from a thriving middle-class black community in Maine. Each of their stories starts with underwater exploration, one a search for fabled gold, the other for families lost at sea. Find out what underwater explorers discovered in these sunken cities beneath the sea.