Phong Nha-Kẻ Bàng is home to some of the largest and most spectacular caves in the world, including the awe-inspiring Sơn Đoòng Cave, which is so massive it even has its own ecosystem. Located in central Vietnam, this national park is a UNESCO World Heritage site and offers an array of cave exploration experiences.
Visitors can trek through caves with subterranean rivers, explore stalactite formations, and hike lush jungle trails. Whether you’re a seasoned spelunker or a first-timer, Phong Nha promises one of the most diverse and exciting caving experiences.
8. La Cueva de los Verdes – Canary Islands, Spain
