Humanity has touched just about every corner of the globe, but there are some places we had enough sense to leave alone.

Old-growth forests are clusters of nature that haven't been touched by humanity and flourished in their isolation. 

The gargantuan redwoods of California, the sprawling rainforests of southeast Asia, and the dark, towering woods of Europe give us a peek into what the Earth looked like in ancient, undisturbed times.

Go inside the epic and lush forests that, thankfully, still grow around the world today.