Most people think living under a rock is something to avoid. But for one Mexican family, it's a dream come true. Farmer Benito Hernandez knew since the age of eight that he wanted to make a 131-foot rock formation in Coahuila, Mexico, his home. It took him 20 years to buy the land but as soon as he was able, Hernandez and his wife Santa Martha constructed a sun-dried brick house beneath the awe-inspiring formation. Located about 50 miles south of the U.S.-Mexico border near the remote community of San Jose de Piedras, the home is small. But it was...