Europe has several physical characteristics. It includes four peninsulas and three main islands: Great Britain, Ireland, and Sicily. It also contains many fjords and two major mountain ranges, the Alps and Pyrenees. Rivers such as the Danube, Rhine, Seine, and Thames historically served as important transportation and trade routes. Culturally, Europe is the birthplace of modern democracy and industrialization and contains iconic landmarks like the Eiffel Tower, Colosseum, and Westminster Abbey across various cities that act as cultural and economic centers.