This world is bursting with ethereal beauty. You'll find some of it at Termas de Río Hondo, which is famous for its natural, bubbling waters.
When you've finished exploring this Tucuman naturally heated water source, why not check out Plaza de la Independencia, 9 de Julio Park, and National University of Tucuman? They're near Termas de Río Hondo and also popular with many travelers.