For many centuries, humankind has dreamt of inner worlds. Numerous writers have been inspired by the idea, not least Tarzan creator Edgar Rice Burroughs (At the Earth’s Core, 1914), Edgar Allen Poe (The Narrative of Arthur Gordon Pym of Nantucket, 1838) and, most famously, Jules Verne, whose 1864 novel Journey to the Center of the Earth has been adapted numerous times for both stage and screen.