<Table> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Angel Island </Td> </Tr> <Tr> <Td_colspan="2"> U.S. National Register of Historic Places </Td> </Tr> <Tr> <Td_colspan="2"> U.S. National Historic Landmark District </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Angel Island Dormitory </Td> </Tr> <Tr> <Td_colspan="2"> Show map of California Show map of the US Show all </Td> </Tr> <Tr> <Th> Nearest city </Th> <Td> Tiburon, California </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 37 ° 52 ′ 11" N 122 ° 25 ′ 34" W ﻿ / ﻿ 37.869712 ° N 122.426006 ° W ﻿ / 37.869712; - 122.426006 Coordinates: 37 ° 52 ′ 11" N 122 ° 25 ′ 34" W ﻿ / ﻿ 37.869712 ° N 122.426006 ° W ﻿ / 37.869712; - 122.426006 </Td> </Tr> <Tr> <Th> Area </Th> <Td> 731.8 acres (296.1 ha) </Td> </Tr> <Tr> <Th> Built </Th> <Td> 1775 </Td> </Tr> <Tr> <Th> Architect </Th> <Td> Unknown </Td> </Tr> <Tr> <Th> Architectural style </Th> <Td> Mission / Spanish Revival </Td> </Tr> <Tr> <Th> NRHP reference #</Th> <Td> 71000164 </Td> </Tr> <Tr> <Th_colspan="2"> Significant dates </Th> </Tr> <Tr> <Th> Added to NRHP </Th> <Td> October 14, 1971 </Td> </Tr> <Tr> <Th> Designated NHLD </Th> <Td> December 9, 1997 </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Angel Island </Td> </Tr> <Tr> <Td_colspan="2"> U.S. National Register of Historic Places </Td> </Tr> <Tr> <Td_colspan="2"> U.S. National Historic Landmark District </Td> </Tr>

Why was immigration through angel island more difficult than immigration through ellis island