What a trip this is! Created by insects? -A.M.
A sophisticated underground ant city once populated by millions of insects has been discovered by a team of scientists.
The abandoned megalopolis, which features vast subterranean highways, paths and gardens, was found buried beneath the earth in Brazil.
It is thought to have housed one of the biggest ant colonies in the world. But no one is sure when the leafcutter species left and what caused their demise.
Scroll down to watch the amazing video
Underground city: The network of tunnels and dens built by millions of Leaf Cutter ants in Brazil