After breakfast, begin your day admiring Barcelona main sights on your included Hop on Hop off City tour. See all the key sights of this fantastic city including the Gothic Quarter which is the centre of the old city of Barcelona. Wander around the ancient winding streets where many of the buildings date A great number of buildings are World Heritage Sites. Especially remarkable is the work of architect Antoni Gaudi can be seen throughout the city. His best known piece of work is the immense but still unfinished Cathedral the Sagrada Familia, Overnight Barcelona.