I would like to visit Arrabida Natural Park. I don't want to rent a car or take a bus tour from Lisbon. Does anyone know if there is any public transit within the park (from Setubal or somewhere accessible from Lisbon)? Or is there anywhere interesting I could walk from Setubal to get to? I also saw that there are some bike rental places in Setubal - has anyone tried renting a bike from Setubal to get around the park?
Thanks for your help!