What is the fine-grained topic of the following text: His labyrinth of bamboo hedges at Fontanellato near Parma reportedly covers some seven hectares (17.5 acres), which would make it more than five times larger than the Pineapple Garden Maze on Hawaii, the largest permanent hedge maze in the Guinness Book of Records. Only return the topic.
The largest bamboo hedge maze at Fontanellato near Parma