Nghe An province in Vietnam is home to several stunning caves that are perfect for exploring during a spring trip. One of the must-visit caves is Pu Mat Cave, located in Pu Mat National Park. This cave is known for its impressive stalactite formations and underground rivers. Another popular cave in Nghe An is Khe Kem Cave, which offers a unique experience with its natural hot springs. Visitors can relax in the warm waters while enjoying the beautiful surroundings. Additionally, Nghe An is also home to Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site. This park is famous for its extensive cave system, including the world's largest cave, Son Doong. Exploring these caves during spring allows visitors to witness the vibrant colors of the surrounding nature and enjoy pleasant weather conditions.