There are many beautiful villas in Sintra and lush gardens in Carcavelos. You can spend a weekend. Estoril e Sintra, however, is better viewed, if you have more time to spend. Estoril e Sintra can then provide you with everything from the Portuguese Formula 1 races on a track just north of Estoril or the beaches of Prala da Ribiera and Prala da Rainha. Travelers frequently go to the Palaces in Sintra. The Quinta da Regleira is a turreted palace with gardens and grottos to explore. You can also view Sintra’s Castelo dos Mouros, built in the 8th century and repaired in the 19th century. The Palácio Nacional de Sintra is a required sight. It was once the summer home for the Moorish Sultans.