A Jungle Inside a Cave 🌳

What happens

Season 12 (Caves, Volcanoes & Wonders) begins in Son Doong, Vietnam, the biggest cave in the world. Sunlight beams through a hole in the cave roof onto a jungle growing INSIDE the cave, swiftlets swirl, cave fish swim in a pool, langurs watch from the entrance, and a cloud forms inside the cave and swallows the ball.

Fun facts

• Son Doong is the biggest cave in the world; a whole city block could fit inside.
• The cave is so big it has its own clouds.
• Trees grow inside where sunlight pours through holes in the roof.

Say hello like a local