Welcome to the world's deepest sleep - a hotel 1,375ft underground but only accessible by hike, zip lines and flooded chambers.<br /><br />Deep Sleep is located in a disused Victorian slate mine below Snowdonia in Wales.<br /><br />Guests can stay in log cabins or slate-roofed chambers - dubbed 'the deepest sleep in the world'.<br /><br />The unique underground hotel sees people venture down through an abandoned Victorian slate mine to reach the remote off-grid camp.<br /><br />It has all-year-round temperature of 10C and the camp comprises of four private twin-bed cabins and a 'romantic grotto' with a double bed.<br /><br />But the adventure begins with a one-hour hike - involving zip lines, steep and vertical terrain and flooded chambers.<br /><br />Visitors first meet their trip leader at 5pm at their Tanygrisiau Base, near Blaenau Ffestiniog. <br /><br />From there, they begin a 45 minute walk up into the mountains, which the team admit is 'steep at times, but remote and very beautiful at the top!'<br /><br />After kitting up with headtorches, helmets, a harness and Wellington boots - adventures must bid farewell to the outside world.
