<Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table> </Td> <Td> </Td> <Td_colspan="2"> Cable Car Museum & Car Barn </Td> </Tr> <Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table>

San francisco cable cars how do they work