@idj_halongbaycruise: ☀Hot summer days, but we have a natural air conditioner - Thiên Cảnh Sơn Cave, where you catch refreshing breezes. Once you're done exploring, you can follow the stairs to a soft sand beach. Enjoy the strolling and if you're lucky, a wonderful sunset 🌅 . . . #indochinajunk #halongbaycruise #baitulongbay #offthebeatentrack #thiencanhsoncave