Does the giant Yeti roam the mountain ranges of Tibet? Does a real-life Shangri-La lie waiting to be discovered in a Himalayan valley? Do transmissions from lost civilizations beam messages of salvation to humankind? What lost creatures lurk in the murky depths of Scotland's brooding Loch Ness? And who - or what - is responsible for the implacable monoliths which tower over Easter Island? The obsession that so many now have with the uncanny and...