How to improve the site of Inca City Machu Picchu, Peru

Though classified as Heritage of Mankind, the celebrated Inca fortress Machu Picchu, Peru, is overcrowded by tourists Its environment is polluted by a railway station, a winding road, and other facilities, including a too small hotel A set of underground facilities is proposed, as well for access means as for accommodation, along examples in some other famous sites worldwide, including an underground hotel, fully hidden from the site.