Experience the world’s largest cave, Vitenam’s Hang Son Doong, from a quadcopter’s POV. The video was filmed by Ryan Deboodt near the entrance and the first and second dolines (skylights), which are 2.5 and 3.5 km inside the cave respectively. Deboodt used the following gear: Canon 6D, Canon 16-35mm f4, DJI Phantom 2, GoPro Hero 4 Black. If you’re interested in learning more about the cave, there’s a great feature by National Geographic from 2011. Be sure to check out the stunning gallery of photos that accompanies the feature article.