<P> The San Antonio River Walk (also known as Paseo del Río or simply as The River Walk) is a city park and network of walkways along the banks of the San Antonio River, one story beneath the streets of San Antonio, Texas, USA . Lined by bars, shops, restaurants, nature, public artwork, and the five historic missions, the River Walk is an important part of the city's urban fabric and a tourist attraction in its own right . </P> <P> The River Walk is a successful special - case pedestrian street, one level down from the automobile street . The River Walk winds and loops under bridges as two parallel sidewalks lined with restaurants and shops, connecting the major tourist draws from the Shops at Rivercenter, to the Arneson River Theatre, to Marriage Island, to La Villita, to HemisFair Park, to the Tower Life Building, to the San Antonio Museum of Art, to the Pearl and the city's five Spanish colonial missions, which have been named a World Heritage Site, including the Alamo . During the annual springtime Fiesta San Antonio, the River Parade features flowery floats that float down the river . </P>

Where does the water from the riverwalk come from