洞穴潜水：从主洞穴“大教堂”进入狭窄的水下隧道，位于安达曼海的Ko Haa

w side tunnel branches from the main chamber of The Cathedral, a cavern diving route where suspended sediment reveals how critical buoyancy control is in this confined passage. Any contact with the walls or disturbance of the silt lining the floor can cloud visibility and damage fragile surfaces, so only divers with advanced buoyancy skills and cave certification attempt this narrower exit into open water. 4K, vertical wide shot, cave diving POV, scuba diver POV. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand.