Mammoth Cave has about 390 miles, or about 625 kilometers, of underground passages already mapped, far exceeding any other cave system in the world. And that's just what's been mapped -- spelunkers admit they are nowhere near exploring every last tunnel.
It is 17,500 Feet Long Peoples
Kentucky.
I'm guessing that means "longest". In which case it is the Flint Ridge / Mammoth cave system (USA), with a combined total of well over 350 miles of surveyed passages.
mammoth cave is over 350 miles long.
mammoth cave KY is a cave in Kentucky that is really, really, really long i mean miles long
The world's largest cave to date has recently been identified. And it's in Vietnam. The Son Doong Cave, located in Phong Nha Ke Bang National Park runs 2.5 miles long, and can get as high as 600 feet, that's nearly twice as the now, second largest cave in the world, Deer Cave in Malaysia
the worlds largest tootsie roll was 50 by 25 by 50 feet long. there ya have it!
2ft long
90 mm
help
The world's largest underground cave, Son Doong, is located in Vietnam. Discovered in 2009 in Phong Nha-Ke Bang National Park, it features massive chambers, unique ecosystems, and its own weather system. The cave stretches over 5.5 miles (9 kilometers) long and reaches heights of 650 feet (200 meters) in some areas. Its impressive scale and natural beauty have made it a significant tourist attraction.
The Sarawak Chamber in Malaysia's Deer Cave is known as the largest cave chamber in the world, measuring approximately 1,640 feet long, 820 feet wide, and at least 230 feet high. Other large caverns include the Miao Room in China's Gebihe cave system and the Clearwater Cave in Malaysia.