- The El Conquistador Water Tower (commonly known as the El Con Water Tower) is an iconic, 90-foot historic landmark located in midtown Tucson - Standing as a unique blend of utility and ornate architecture, the tower rises above its modern surroundings and serves as a striking symbol of early 20th-century Tucson development - Built in 1928 by developer Martin Schwerin, it originally functioned as a standard, utilitarian steel water tower supported by open metal legs ... it housed a 50,000-gallon tank designed to supply water to the newly developing, upscale Colonia Solana neighborhood - 174 Randolph Way Map