It almost needs no introduction. The Onyria Quinta da Marinha Hotel, which has an incredible view of the green, was refurbished in 2020 to better integrate it with nature, which is understandable given its location in the heart of Sintra-Cascais Natural Park. It has a spa, a gym and spacious rooms; however, it is best known for its Robert Trent Jones-designed golf course. A 5,870-metre, 18-hole course. The 19th hole is the Trent Jones bar overlooking the lake, which serves drinks and light meals (including cream of tomato with poached egg, omelettes, pasta, grilled salmon and sandwiches). Now and again it has live music. You can create bespoke golf packages (with accommodation, lessons, unlimited access to the surrounding golf courses). And the hotel offers free transport for guests wanting to take a look around Cascais.