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.
In this area, the regular way of building a double-sided wall is impossible. The lofty peaks serve as natural barriers on the other side. The height varies according to the terrain, often measuring 2-3.5 meters (6.6-11.5 feet) tall. A famous and steep single wall is located at Simatai Great Wall in Beijing.