A lagoon connected to the Atlantic Ocean, hosting canoe sprint and rowing events for the Olympics and Paralympics. In 2015, thirteen American paddlers had stomach problems after a competition in the lagoon.  There is not sufficient time to clean the lagoon effectively for the Olympics and health risks were prevalent for athletes. The Lagoon is also known as “The Heart of Rio de Janeiro”. Initially inhabited by the Tamoios Indians who dominated the lagoon, they were exterminated by the arrival of Portuguese colonizer, Dr. António Salema (1575-1578) who freed himself of the “undesirable presence of the native Indians” by spreading clothes that had been worn by people sick with smallpox along the banks of the lagoon. Dr. António Salema constructed the King’s Mill here, where in 1808 the Portuguese Royal Family took up residence when the court of Portugal moved to Brazil (41).