The city itself is an intriguing mix of the traditional and the industrial, with medieval alleyways threading through a UNESCO World Heritage site where imposing churches with opulent gilded interiors abound. Meanwhile on the other side of the river in Gaia, the port houses extend tours and tastings of their tawny and ruby wines. Highlights of modern architecture include the iconic Casa da Musica, and the Serralves museum which attracts visitors as much for its lush parklands as its impressive contemporary art collection. However, in Porto beauty can be also found in the most ordinary of places, from the neo-gothic Lello bookshop to the stunning azueljo ceramic tiles showcased in Sao Bento railway station.