Nelson Island is one of the Five Islands which lie west of Port of Spain in the Gulf of Paria.
Nelson Island is famous as the disembarkation point and quarantine station for indentured immigrants to Trinidad and Tobago in the nineteenth and early twentieth century. For this reason it has been called the Ellis Island of Trinidad and Tobago.
At Nelson Island, the Indian immigrants and the ship, food and stores were inspected by the Protector of Immigrants. Their bundles and blankets were fumigated and they were quarantined and allowed to recover and regain strength. This measure was designed to prevent the spread of diseases which might have been transported from India.
Wikipedia https://en.wikipedia.org/wiki/Nelson_Island_(Trinidad_and_Tobago)
Coordinates 10°39'29.992" N -61°35'56.022" E