Praça da Sé

This is Praça da Sé, milestone zero, if there is such an expression. My English knowledges fail me now. Anyway, what I mean is Praça da Sé is (or used to be, when the city was not this huge) located exactly in the middle of the city. With Marcos' picture, you saw the underground. With this picture, you get to see what's on the surface.