Men An Tol - Cornwall, England
Mên-an-Tol is supposed to have a fairy or piskie guardian who can make miraculous cures. In one story, a changeling baby was put through the stone in order for the mother to get the real child back. Evil piskies had changed her child, and the ancient stones were able to reverse their evil spell. Local legend claims that if at full moon a woman passes through the holed stone seven times backwards, she will soon become pregnant. Another legend is that passage through the stone will cure a child of rickets (osteomalacia). For centuries, children with rickets were passed naked through the hole in the middle stone nine times.