For those who go in search of the isolation, silence and adventure of wild places it is―perhaps ironically―to the man-made shelters that they need to head; the outposts: bothies, bivouacs, cabins and huts. In his new book “Outpost: A Journey to the Wild Ends of the Earth,” Dan Richards says that part of their allure is their simplicity: enough architecture to shelter from the weather but not so much as to distract from the immediate environment around.