The ten caves on this list are the largest known in the world, based on the overall length or volume of the caverns that have been explored:
Mammoth Cave
Mammoth Cave, which can be found in Kentucky, United States, is the cave system that is known to be the longest in the entire world. It has been measured at a length of nearly 640 kilometers, which is over 400 miles.
Sistema Sac Actun
The Sistema Sac Actun is an underwater cave system located in Quintana Roo, Mexico. It is regarded as the second longest cave system in the world, with a total length of around 216 miles (347 kilometers) that has been surveyed.
Jewel Cave
The Jewel Cave in South Dakota, which is the United States of America, is the third longest cave in the entire globe. It runs for a cumulative distance of more than 200 miles (or 321 kilometers).
Veryovkina Cave
The Veryovkina Cave in Abkhazia, Georgia is the cave with the deepest known depth on Earth, measuring a staggering 7,257 feet (2,212 meters) at its lowest point.
Sistema Ox Bel Ha
The Sistema Ox Bel Ha is an additional underwater cave system located in Quintana Roo, Mexico. It is approximately 270 kilometers long and 168 miles long.
Wind Cave
Wind Cave is a cavern that stretches for more than 149 miles (240 kilometers) and may be found in South Dakota, United States.
Lechuguilla Cave
The Lechuguilla Cave is well-known for the incredible variety of mineral formations that it contains. This cave may be found in New Mexico, in the United States. It has a length of more than 222 kilometers (138 miles).
Sistema Dos Ojos
Another underwater cave in Quintana Roo, Mexico, the Sistema Dos Ojos cave is around 82 kilometers long and may be found in the state of Quintana Roo.
Optymistychna Cave
The Optymistychna Cave is one of the longest gypsum caverns in the world, measuring in at over 230 kilometers in length. This cave can be found in the Ukraine.
Cueva del Viento
The Cueva del Viento in Tenerife, Spain, boasts the world’s longest lava tube at a distance of over 18 kilometres and is known as the world’s largest lava cave.
It is important to keep in mind that new findings in the field of speleology (the scientific study of caves) are being made all the time, and it is possible that the rankings will shift as more vast cave systems are found and studied.