Take a walk to this popular lookout point which offers a panoramic view of Lisbon and the Atlantic Ocean. It gets especially splendid at sunset and sunrise. The name of this viewpoint is derived from the Chapel of Our Lady of Mount, that is located on this hill since 1147.
Wikipedia (Portuguese) http://pt.wikipedia.org/wiki/Miradouro_da_Senhora_do_Monte
Coordinates 38°43'8.918" N -9°7'57.962" E