Menhirs: In many countries, there is the tradition of having high menhirs in the garden. It's very common for a Japanese garden, but also for the Chinese garden. The English have adopted this tradition of Celtic. In their gardens, block stone monoliths are almost mandatory because, with their presence, they often recall the guards. They also symbolize strength, endurance, and dignity. If you choose to have such a thing in your rock garden you have certainly a very original decor.