Overview: It's very rare and you'll only find it up in the very rare air. And even if you have the lungs, stamina and perseverance to get there you'll need razor-sharp eyes, hardy hands and knees and plenty of patience to find it. So what is it? Well it's part-monster, part-mummy and depending on who you talk to it has a multitude of super powers from heart health to sex aid. On one of the strangest journeys we've ever undertaken, we go in search of, er - what to call it? The mile-high grub? No.