The University of Iowa is a major national research university located on a 1,900-acre campus in Iowa City in southeast Iowa, on the Iowa River near the intersection of U.S. Interstate Highways 80 and 380. Iowa is composed of 11 colleges, the largest of which is the College of Liberal Arts and Sciences, enrolling most of Iowa's undergraduates. The Henry B. Tippie College of Business, the Roy J. and Lucille A. Carver College of Medicine, and the Colleges of Education, Engineering, Law, Nursing, Pharmacy, enroll undergraduates, and with the Colleges of Dentistry and Public Health provide graduate education in conjunction with the Graduate College.More than 30,500 students enroll at Iowa each year. Some 55 percent come from Iowa, 25 percent from adjoining states, and 9 percent from the remaining states. International students from 100 countries make up 10 percent of the University's enrollment. The faculty numbers about 1,700 and there are about 13,000 staff. The total annual operating budget is about $2.8 billion, and there are more than 120 major buildings, most of them within walking distance of one another. Adding to the population are more than a million visitors each year who come to enjoy cultural events and art exhibits, to attend Big Ten athletic events, and to participate in the many conferences and educational programs scheduled at the University year-round.