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.
The world's largest cave is Son Doong in Vietnam, measuring over 5.5 miles long and 650 feet wide. It was first discovered in 1991, but only explored in-depth in 2009.
mammoth cave is over 350 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
mammoth cave KY is a cave in Kentucky that is really, really, really long i mean miles long
the worlds largest tootsie roll was 50 by 25 by 50 feet long. there ya have it!
2ft long
90 mm
help
6 meters = 19.6850394 feet Source: http://worldmustbecrazy.blogspot.com/2009/05/worlds-largest-squid-ever.html
Taking "largest" to mean longest... Not easy to establish - different sources quote different lengths but the most extensive is the Flint Ridge - Mammoth Cave system, in Kentucky,with over 350 miles of surveyed passages. Caves over 100 miles long are unusual; one of this magnitude rare.This length is notof a single passage but a complex network.