Both are bodies of water partially surrounded by land, and a bay is a smaller version of a gulf. Famous bays include the San Francisco Bay (California), the Bay of Pigs (Cuba), Chesapeake Bay (Maryland/Virginia area), Hudson Bay (Canada), the Bay of Bengal (a large bay near India and southeast Asia), and the Bay of Biscay (France). Famous gulfs include the Gulf of Mexico (southern United States), the Persian Gulf (between Saudi Arabia and Iran), and the Gulf of Aden (between the Red Sea and the Arabian Sea).