Also known as Rock Fort, this site towers over Calliaqua Bay and Indian Bay. Its guns sit on a 190ft volcanic plug which sticks out of the sea on the Windward side of St Vincent. The fort was built to protect the colonial hub of Calliaqua where sugar was loaded onto ships bound for English ports. 
There is a staircase which snakes up the rocky outcrop to two gun decks, with original cannon from the reigns of George II and George III. The site has a rich natural heritage too, with lush flora clinging to Fort Duvernette. The Royal Marines who might have once been seen guarding Fort Duvernette wore red coats which earned them the nickname ‘lobsters’. Today the lobsters have been replaced by beautiful sea birds such as Ramie Pigeons, Blue Herons and Sea Hawks. The waters surrounding the fort are home to White Sea-Orchids and seagrass.