Austin calls itself the Live Music Capital of the World, and music runs through its streets, venues, and festivals. South Congress Avenue, known as SoCo, mixes vintage shops, food trucks, and music venues south of the river, Barton Springs Pool offers a spring fed swimming pool in Zilker Park, and Lady Bird Lake gives downtown a calm waterway for kayaking and paddleboarding. The Texas State Capitol stands in pink granite at the north end of Congress Avenue, and the University of Texas at Austin brings students, research, and Longhorn sports to the center of the city.