🗿The uniqueness, mutual exclusivity and enormity of the two dolines that adorn the world’s biggest cave, Son Doong, form the inside is something you’d have never seen before! It is only due to the presence of these extraordinary dolines that sunlight can stream through the cave and continue the cycle of creation and sustenance of the cave's exclusive flora & fauna. Sign up for Son Doong Expedition at: https://oxalis.com.vn/tour/son-doong-cave-expedition-4d3n/ #TheOxalisExperience #Dolines #SonD