Overview: A thrilling underground boat journey through a massive limestone karst network in Khammouane Province.
What to Expect:
- Morning: Journey to the base of Phou Hin Poun National Protected Area and board a motorized longtail boat equipped with headlamps and local boatmen.
- Afternoon: Navigate 7 kilometers through total darkness along an underground river, marveling at cavernous limestone ceilings over 100 meters high, before emerging into a secluded valley on the other side for a short village visit.