Be honest: we all have our little secrets! But some places are so closed off and heavily guarded that it's practically impossible to get in - or to get out alive. Well, at least that's been the case so far: buckle up, because we've got you a free ticket to the most inaccessible places on earth! Together we'll go everywhere: from the safest Starbucks in the world, to a strange concrete hole in the ground, to the legendary Area 51!