Reserva Natural do Estuário do Tejo
This extensive natural reserve area along the left bank of the Tagus River has diverse fauna and flora, great bird-watching, and hiking through the area. The privately run EVOA Visitor and Birdwatching Center, which has a permanent display, is one of the best ways to see the park: there are daily guided tours on foot (1½ hrs from €15 per person on weekends or €39 for up to three people on weekdays) or by electric vehicle (€4 per person extra), and various private tours and birdwatching packages.
