Geographic Information Systems (GIS) consists of data, software and hardware to generate, store, manage, analyse, and visualise georeferenced information. The use of GIS has increased in recent decades for three reasons: (1) public, free and high-quality georeferenced information is increasingly available, (2) free and powerful GIS software has been developed, and (3) georeferenced information has been incorporated into our daily life. Nowadays, GIS is an indispensable part of many fields and studies thanks to its ability to integrate and analyse large volumes of data with little effort and computational requirements. The development of GIS has led to a democratisation of the information created and visualised through them, a process we aim to contribute to. In this chapter, we describe the first integrated GIS of the Pampean lakes (available here: https://rdu.unc.edu.ar/handle/11086/553631 ). It was elaborated from information provided by 12 chapters of this book. The GIS includes lakes, wetlands, valley boundaries, paleochannels, streams, dunes, flooded areas, fault systems, salinas, orography, vegetation, aeolian units and archaeological sites. Additionally, we present a series of uses.