See lisbon in a new light on a 4 hour downtown walking tour a local guide will lead you through the heart of lisbon to its most revered landmarks sights and attractions see the ponte 25 de abril 25th of april bridge over the tagus river the lisbon cathedral and santo antnio church stroll down cais do sodre to praa do comercio commerce square also known as terreiro do pao youll never see lisbon the same way again