A homeowner was stunned to uncover a beautiful 18th-century Gothic folly hidden at the end of his suburban back garden at the house where he has lived for 25 years. John Bostock, 62, had been pruning ivy and tidying up his garden ahead of moving house when he made the incredible discovery on July 3. The striking 12-foot (3.5-meter) ornate brick structure is decorated with oyster shells, bones, and teeth from cows and sheep and includes windows and an archway at the front. It is believed to date back to the mid-1700s when aristocrats built decorative follies as garden features. Experts told John that a woman of the house may have used the grotto to relax and get away from the hustle and bustle of the manor house that once stood on the site. The perfectly intact backyard folly in leafy Edgbaston, Birmingham, is just half a mile away from …