Moles are a common nuisance to households and businesses, causing major damage to lawns, flower beds, bowling greens as well as domestic and commercial machinery. Molehills and raised ridges appear overnight as they establish their complex network of deep underground chambers and feeding tunnels. While not necessarily dangerous, they can ruin your garden or yard. Moles very rarely surface so it is unlikely that you will ever see one, but you will see the effects of their tunnelling. Not only do they damage plant roots, the stones that are brought to the surface while tunnelling, can result in extensive damage to machinery.