The Hotel Wellington Madrid is a sustainable hotel located in the Salamanca district of Madrid. The hotel has a number of sustainable features, including a green roof, solar panels, and a rainwater harvesting system. The hotel also has a number of energy-efficient features, such as LED lighting and a smart heating and cooling system. The hotel is committed to reducing its environmental impact and has implemented a number of initiatives to achieve this goal. The hotel also offers guests a range of sustainable amenities, such as organic toiletries and locally sourced food.