Photo credit: Carsten Peter/National Geographic

The Hang Son Doong in Vietnam is touted as the world’s largest cave, complete “with caverns big enough to fit an entire city street inside them.” That’s not all, it even has its own jungle as well. Video after the break. Click here for more pictures.

Up top is quite possibly the biggest subterranean passage on the planet, capable of fitting inside a half-mile block of 40-story buildings.

[via GizmodoNationalGeographic]