Between Basse-Terre and Grande-Terre lies the Grand-Cul-de-Sac Marin nature reserve, encompassing both land and sea. From the coastal mangroves to the coral reef forming its boundary lays a rich marine environment in which visitors may be lucky enough to spot a turtle. Discover the mangrove swamps, visit the offshore islands and go snorkelling, courtesy of the boat trips that operate from Sainte-Rose.