<Tr> <Th_colspan="2"> Leaning Tower of Pisa </Th> </Tr> <Tr> <Td_colspan="2"> Torre pendente di Pisa </Td> </Tr> <Tr> <Td_colspan="2"> Leaning Tower of Pisa </Td> </Tr> <Tr> <Th_colspan="2"> Basic information </Th> </Tr>

What is the speciality of leaning tower of pisa