Braidwood is a city in Will County, Illinois, United States, approximately 53 miles (85 km) southwest of Chicago and 18 miles (29 km) south of Joliet. The population was 5,203 at the 2000 census. The Braidwood Nuclear Generating Station, a nuclear power plant currently owned by Exelon Corporation, is also located in the area (although the plant's address is actually in the nearby town of Braceville).
The Son Doong Cave in Vietnam is the biggest cave in the world. It's over 5.5 miles long, has a jungle and river, and could fit a 40-story skyscraper within its walls. But nobody knew any of that until about six years ago.
For all its magnitude, it should be remembered that Mammoth Cave is only one of many large caves in Kentucky. Kentucky is home to another 14 of the longest caves in the world. Prior to 1983, it was 3, but the 50 mile (80 km) long Roppel Cave System was connected to Mammoth Cave and removed from the list.The Fisher Ridge cave system currently ranks seventh on the world list, with a total length of 112 miles (180 km).or all its magnitude, it should be remembered that Mammoth Cave is only one of many large caves in Kentucky. Kentucky is home to another 14 of the longest caves in the world. Prior to 1983, it was 3, but the 50 mile (80 km) long Roppel Cave System was connected to Mammoth Cave and removed from the list.