Visit the UNESCO-listed Phong Nha-Ke Bang caves in Vietnam, a must-see from Dong Hoi. To make the most of your visit, consider joining a guided tour that includes round-trip transportation, entrance fees, lunch, and guidance on the activities included. Explore the stunning Paradise Cave, refuel with a local lunch, and then head to Dark Cave for an action-packed adventure that includes ziplining, kayaking, a mud bath, and river mini-ziplines and swimming. Hotel transfers are included.