If you're interested in finding out about past civilizations, check out Museu de Arqueologia e Etnografia. Study its unusual artifacts and gain an insight into the rituals and behaviors of people from long ago.
It won't take too long for you to find out why this exhibition of human history is popular with travelers to Santa Maria da Graça. Pay the admission fee and then explore it at your own speed. If you're up for more fun adventures, Troia Beach, Galapos Beach and Portinho da Arrabida Beach are easy to get to from Museu de Arqueologia e Etnografia.