WATCH: Florida fisherman catches 552-pound grouper on kayak. 1  Florida fisherman Jon Black caught a 552-pound grouper while fishing in Sanibel Fla. on May 20. 2  He believes this is a record catch for someone on a kayak.
The Greek historian Herodotus claimed that Babylon surpasses in wonder any city in the known world and specifically praised the walls which he said were 56 miles (90 kilometres) long, 80 feet (24 metres) thick, and 320 feet (97 metres) high.
The Ten Thousand Li Wall, as it is known in China, is 1,500 miles (2,400 kilometers) long, from 15 to 50 feet (5 to 15 meters) high, and from 15 to 25 feet (5 to 8 meters) wide. Although closely linked with the first ruler of the Ch'in Empire, the wall as it stands today dates mainly from the later Ming Dynasty.