Some believe that another world exists alongside our daylit, waking reality - a shadowland of faeries, angels, and elemental spirits. There are places where these worlds are said to overlap, regions described as 'window areas' by modern UFO enthusiasts. But just what are these places? Ancient sacred sites? Gateways into faerieland? Telluric and electro-magnetic 'hot spots'? Doorways into other dimensions or black holes in concensus reality?