OPorto - Portugal Coimbra - Portugal Av. Liberdade, Lisbon - Portugal Belém, Lisbon - Portugal Baixa Lisbon - Portugal Quarteira, Faro - Portugal Lagos, Faro - Portugal Oslo, Norway The cobblestone is used especially for paving sidewalks and public spaces in general . This type of drive is often used in speaking countries . It follows from the paving stones of irregular shape , usually limestone and basalt , which can be used to form decorative patterns in the contrast between the stones of different colors. The more traditional colors are black and white, although they are also popular brown and red. Photos: Celso Gonçalves Roc2c