📜 Large limestone cave in Phu Hin Bun National Park, formed by the Nam Hin Bun River. 🔍 Known for its impressive size, unique underground river, and geological wonders, with chambers up to 100 meters tall. # Why Go 🛶 Explore by long-tail boat through 7.5 km of caverns in utter darkness, lit by headlamps ✨ Marvel at majestic stalactites and towering stalagmites 💎 Discover an emerald-tinted sacred pool 🚶 Walk through sections with impressive limestone formations # Why Avoid ⚠️ Mobile connection may be unstable in some areas 🌧️ Rainy season (May-Oct) can bring dangerous floods # Tips 👟 Wear comfortable shoes/sandals that can get wet for boat entry/exit 🔦 Head torch and life jacket included with boat ticket 🧑‍🤝‍🧑 Hire local guides for safety and better experience 🗓️ Best to visit during dry season (Nov-Apr) for higher water levels # Hours 🕒 Best visited during dry season (November to April) # Parking 🅿️ Guesthouses and resorts near entrance, closest ATM in Na Hin # Location 🗺️ Located in Khammouane Province, accessible from Ban Khoun Kham or Ban Naphouak