Once a stronghold of power in the Mekong River basin, Champasak is now a sleepy province that encompasses the beguiling Si Phan Don (4 000 islands) archipelago on the Mekong River, as well as several key conservation and biodiversity areas. Champasak city itself is a small, laid-back town dotted with French colonial architecture and glittering Buddhist temples. It provides access to the evocative archaeological site of Wat Phu - a crumbling but still majestic Khmer temple complex and UNESCO World Heritage Site that dates back to at least the mid-5th century. A stone stairway dotted with fragrant Frangipani trees leads to the highest point of the wat, and the climb is well worth it for the incredible views over this ancient architectural wonder. An adventure seeker and nature lovers playground, Champasak Province boasts 178 named mountains that are waiting to be explored.