Sintra-Cascais Natural Park
Time Out says
The figures provided by the local council are not wrong. In the 14,583 hectares that make up this park - partly in Sintra county, partly in Cascais - there are 33 different mammals, more than 160 different birds, 12 species of amphibians, 20 types of reptile and nine different kinds of freshwater fish. And no, this is not a zoo. It is a park where you can lose yourself on the trails, in the incredible views, in the pines and on the cliffs. It is the right place for real walking enthusiasts, and has a number of different routes that can easily be found online.