River Antoine Rum Distillery is 6 mi. (10 km) n. of Grenville near Lake Antoine. One of the oldest water-driven distilleries still in operation in the Caribbean, the mill was built in 1785. Its signature product is the overproof Rivers Rum, a high-octane drink with an alcohol volume of more than 75 percent, or 151 proof. Guided tours of the distillery's operation include sugar cane crushing, extraction, fermentation, distillation, bottling and sampling.