Iris Bay is a small bay immediately south of Muller Point at the east end of South Georgia, lying 6 miles (10 km) northwest of Cape Vahsel, along the embayment between Cape Vahsel and Cape Charlotte. The name "Sandwich Bay", for John Montagu, 4th Earl of Sandwich, was given to the whole embayment between Cape Vahsel and Cape Charlotte in 1775 by a British expedition under James Cook. The name was later restricted on maps to the small bay described, since a name for the large embayment was not considered useful.