The eerie green glow of the kayak against the Xe Bang Fai river obviously enhances the spooky alien feel but the truth is, the river cave Tham Khoun Xe in Laos really looks like a completely different world. Ryan Deboodt shot his two day kayaking trip through the 6km long cave, showing the heights of the cave (it’s over 55m tall) and its unbelievable beauty.