Nicknamed “Linenopolis”, Belfast has been a centre for the Irish linen industry. It also the centre for the tobacco production, rope-making, and shipbuilding. Belfast became the biggest city in Ireland at the beginning of the 20th century. Belfast Castle and Belfast City Hall are some of the popular tourist attractions in the city. Park and gardens are an integral part of Belfast’s heritage, and home to an abundance of local wildlife and popular places for a picnic.