Xe Bangfai River, Mekong River Valley Travel Guide

The Xe Bangfai River, also known as Nam Xebangfai, originates in the Annamite Range on the Laos-Vietnam border and flows through Khammouane and Savannakhet provinces. This hidden gem in Laos is renowned for its stunning scenery and tranquil environment. The river meanders through lush landscapes, offering visitors a chance to connect with nature in an unspoiled setting. The surrounding area is rich in biodiversity, making it a haven for birdwatchers and wildlife enthusiasts.The highlight of the Xe Bangfai River is the Xe Bangfai Cave, one of the world's largest active river caves. The cave chamber measures 76m in width and 56m in height, creating a massive passage. The cave remained virtually unknown except to locals until a National Geographic survey brought it to world attention in 2008. The cave is navigable by boat for 2km until encountering rapids. Inside, you'll find grand limestone chambers, flowstones, and cave crystals. A climb through a branch cavity reveals a chamber evocative of a Dragon Hatchery, leading to an elevated balcony with a view of the opening.Local villagers traditionally believed the cave to be the source of the river, calling it Tham Khoun Xe, meaning “the cave at the source of the river”. According to legend, a benevolent spirit inhabits the cave. The spirit was known to lend beautiful clothes for ceremonies, and once restored a broken musical instrument left at the entrance. The villagers conserve a 200m radius pond outside the cave as a fish breeding zone.Visitors can take boat trips into the cave, with options for short or long tours. The short tour ventures into the Dragon Passage, while the long tour reaches the thrilling dark zone. The best time to visit is between November and January. During the rainy season, boat travel is often necessary to reach the cave entrance.