The Salvation Islands are a group of small islands of volcanic origin about 11 kilometres off the coast of French Guiana, 14 kilometres north of Kourou, in the Atlantic Ocean. Although closer to Kourou, the islands are part of Cayenne commune, specifically Cayenne 1er Canton Nord-Ouest.
There are three islands, from north to south:
Devil's Island, the most famous due to the political imprisonment there of Captain Alfred Dreyfus, is better known to French speakers as Île du Diable. The total area is 0.62 square kilometres. Devil's Island and Île Royale are separated by Passe des Grenadines, Île Royale and Saint-Joseph Island by Passe de Désirade.
Wikipedia https://en.wikipedia.org/wiki/Salvation_Islands
Coordinates 5°17'14.772" N -52°35'8.216" E