Unique property in the heart of the Sintra Natural Park with over 13 hectares of forest, facing the Seteais Palace. This 18th-century estate, formerly known as Quinta de Cima de Seteais, in Sintra, a village classified as a UNESCO World Heritage Site, extends to the Pena Palace, occupying part of the western slope of the mountain. With complete privacy, dense vegetation, and lush forests, this property is an irresistible invitation to relaxation. Throughout the estate, we can find the ancient paths that served as access from the Pena Palace to the Seteais Palace and the historic center of Sintra, evoking an atmosphere of bygone times. The house, designed by architect Tiago Bradell, maintains the essence of Sintra's romantic chalets with contemporary elements that offer maximum comfort such as underfloor heating powered by an electric heat pump. At the entrance, there is a spacious hall leading to the common areas of the living room, library, and dining room, with large windows overlooking the greenery of the Sintra Mountains. The rooms, all en suite, offer breathtaking views and direct access to outdoor spaces. On the upper floor, there is the master suite with a living room, closet, and private terrace, with ample spaces and views of the garden. The lower floor is occupied by a large garage for 10 vehicles, a multi-purpose room that can be used as a cinema or gym, a security room, and the technical area. The entire house is served by an elevator. The property not only offers a multitude of outdoor spaces but also small interior courtyards that invite moments of tranquility, perfect for enjoying a good book in natural light. Located just a five-minute walk from the historic center of Sintra and a short distance from Cascais and several international schools, this exclusive property offers a privileged location that combines the historical charm of Sintra with the convenience of nearby urban centers. It is 40 minutes away from Lisbon International Airport. In a world where privacy and contact with nature are increasingly rare treasures, this 18th-century estate continues to captivate visitors, contributing to the cultural and landscape heritage of Sintra.