Monica Galetti and Giles Coren visit ION Adventure Hotel in Iceland, a design hotel levitating out from a dormant volcano. Guests visit here expecting the adventure of a lifetime, exploring lava flows and glaciers. Taking guests snorkelling in near-icy water reveals secret and stunning rock chasms between the earth's tectonic plates, and learning how to keep guests safe on an erupting volcano is a trip of a lifetime.
