Not a fan of tan lines? Head due south and lay your towel on Plage de la Souris Chaude, which is a favourite among nudists (only just tolerated) and gay men (head to the northern tip of the beach). It remains largely off the tourist radar, not least because it's a bit hard to find. Swimming is forbidden (and dangerous, because of sharks and currents).
Plage de la Souris Chaude
Réunion