<Tr> <Th> Water volume </Th> <Td> 108 km (26 cu mi) </Td> </Tr> <Tr> <Th> Surface elevation </Th> <Td> 32.7 m (107 ft) </Td> </Tr> <Tr> <Th> Islands </Th> <Td> 400 + (including Islets of Granada, Ometepe, Solentiname Islands, and Zapatera) </Td> </Tr> <Tr> <Th> Settlements </Th> <Td> Altagracia, Granada, Moyogalpa, San Carlos, San Jorge </Td> </Tr>

How many islands are there in lake nicaragua