Also on these boards
Chapel of St. Barbara (Le Faouët, Brittany) I don't know if it's abandoned, but it's old and beautiful.
Toronto's Majestic Castle, Casa Loma, in Ontario, Canada. The former home of Canadian financier, Sir Henry Pellatt. Canada's foremost castle complete with decorated suites, secret passages, an 800 foot underground tunnel, towers, stables and beautiful 5 acres estate gardens, all in a 98 room castle.