Also known as Paseo del Rio, this 15-mile-long river walk is a must-do in San Antonio. Opt for a self-guided walking or bike tour of the riverside paths, lined with beautiful cypress trees, shops, museums, hotels and of course, Tex-Mex restaurants. But one of the best ways to experience the River Walk is on a hop-on, hop-off cruise, which glides past iconic spots like the Arneson River Theatre, Marriage Island, and the San Antonio Museum of Art. Visit during festivals and holidays like St Patrick's Day and Christmas for exciting river parades and spectacular light illuminations. – Tripadvisor