The world’s largest cave system is Mammoth Cave in Kentucky, USA. It stretches over 650 kilometers (400 miles) of explored passageways, making it the longest known cave system on Earth. Mammoth Cave is famous for its vast chambers, underground rivers, and unique rock formations.

This cave system is home to many rare animals adapted to life in the dark, such as blind fish and cave crickets. It has been used by humans for thousands of years, with evidence of Native American activity found inside. Today, Mammoth Cave is a national park and popular tourist destination, offering a glimpse into the hidden underground world beneath our feet. Shutdown123