<Tr> <Td> Great Wall of China </Td> <Td> Since 7th century BC </Td> <Td> China </Td> </Tr> <Tr> <Td> Petra </Td> <Td> c. 100 BC </Td> <Td> Jordan </Td> </Tr> <Tr> <Td> Christ the Redeemer </Td> <Td> Opened October 12, 1931 </Td> <Td> Brazil </Td> </Tr> <Tr> <Td> Machu Picchu </Td> <Td> c . AD 1450 </Td> <Td> Peru </Td> </Tr>

What are the wonders of the world and how many are there