Best Sightseeing Open Sky, this tour is amazing, lasting an average of 3,5  hours, and it passes through the main points of the Sintra Mountains (the Sintra Mountains in Portugal are part of the Cultural Landscape of Sintra, located within the Sintra-Cascais Natural Park, which was classified as a UNESCO World Heritage Site in 1995). The tour sold here includes surrounding areas(no beaches at this option), with a focus on the Pena Palace, Mont Serrat Palace, and Cabo da Roca. The passenger has the option to be picked up directly at their hotel in the Lisbon*, Sintra, or Cascais area (*subject to availability).