Oolong and Darjeeling are two types of TEA. Oolong is a semi-oxidized TEA that is produced through a unique process of withering the plant under strong sun and oxidation before curling and twisting. Darjeeling is a type of black TEA grown in the Darjeeling district of India. It has a light, floral flavor and aroma. Both teas are popular for their health benefits, including aiding digestion, reducing stress, and boosting the immune system.