This stunning video was shot by cave, adventure, and travel photographer Ryan Deboodt. Discovered in 1991, but only recently explored in 2009, the world’s largest cave, Hang Son Doong, in Vietnam is now open to public exploration. After traversing a mile through the enormous stalagmites and stalactites, a beautiful, otherworldly scene emerges. Watch this breathtaking video, all captured on the first aerial drone to ever enter the cave.