© All Rights Reserved The wonderful Art Nouveau facade of the Pérola do Bolhão delicatessen on Rua Formosa in the heart of Porto.The shop was once a tea shop, hence the Cha on the sign - yes that's where the British get the expression cup of 'cha' from!Related images Largo Sao Domingos - Porto River Douro Art Nouveau in Porto The walk down to the bridge - Porto Cnetral Porto Buildings Foz do Douro Promenade