Discover the amazing diversity of Vietnamese landscape on the Phong Nha Cave Exploration Tour. Named a UNESCO World Heritage Sight in 2003, Phong Nha National Park is home to Asia's oldest karst mountains, dating back 400 million years. This active adventure has everything an explorer is looking for: from relaxing walks to hard mountainous treks, dense forests and breathtaking panoramic views. Explore the banks of Ben Hai River, cross the Hien Luong Bridge, squeeze through tight tunnels, conquer hill tops and and feel the refreshing cool of mountain streams. Enjoy a delicious lunch surrounded by astounding natural beauty and cruise along Son River in a kayak. Two equally appealing options are available for this tour: Paradise Cave Discovery Tour (includes a fairly tough 3 hour hike - the less touristy option) and Ke Bang Day Trip (includes a Son river boat trip to Phong Nha Cave - the more touristy, but less strenuous option).