Cambridge University and the city of Cambridge are so intertwined, they are often thought of as being the same place. The university is where Newton, Darwin and Hawking, among many other scientists and dozens of Nobel Prize winners, received their higher education. The various colleges of the university were all built in different periods and, as a result, they reflect the different architectural styles common of the era in which they were built. The majority of structures are early Medieval style, with the school buildings' colonnades, staircases and walls decorated with solemn statues and seals. Taking a tour of the college grounds is an exceptional experience. While in Cambridge, visitors can take a flat-bottomed boat for a tour of the Cam River. Along the way, the beautiful scenery of King's College, Trinity College and the Queen's College Garden, will pass by, along with floating under many bridges including the Mathematical Bridge and the Bridge of Sighs.