San Luis has been chosen by nature to establish its wonderful and amazing masterpieces.From San Luis mountain ranges at the south to Comechingones mountain ranges, many villages full of history, melancholy and beauty are found, as well as little valleys, streams of clear water, dams and volcanic hills.Far from the noise and the big city, San Luis is the accurate and perfect entrance to the nature and the lost history that come to life again through the old trees, abandoned mines or by the trace of that sometimes was a secret city only known by world superpowers.The province of San Luis might be described metaphorically as a "golden rectangle" where diverse mountain ranges, climates, flora and fauna meet. In fact with a bit of imagination, the borders of the province can be viewed as forming a rectangle running from north to south with a clear division in the middle: the mountains lie to the north and flatlands to the south.The provinces of la Rioja and San Juan lie on the northern border of San Luis, with Mendoza to the west and La Pampa to the Southeast. The northern part of the province, dominated by the provincial capital of San Luis, has three chains of mountains running longitudinally, which are, from east to west: the Comechingones and the San Luis mountain ranges and lesser chains such as El Gigante and Alto Pencoso. The Comechingones mountains, shared with the province of Córdoba, enter the north-eastern corner of San Luis at Merlo, decreasing in altitude as they progress south.The western slope is the most precipitous whe the eastern incline, in the province of Córdoba, is gentler. "The Comechingones slope is very picturesque. The greyish rock running from the summit downward contrasts with the intense green of the wooded part of the slope when they meet at approximately 1300 above sea level.The thickly-wooded region benefits from less extreme climatic conditions and more abundant precipitation, as well as the innumerable mountains streams running down the incline. Tse courses of water have given rise to the numerous small settlements that dot the magnificent face of the mountain range".Forming a backdrop for the city of Merlo, the highest peak of the Comechingones range is Cerro de las Ovejas (2260m); further on to the south is the beautiful Cerro de la Bolsa (2126m) between Las Molles and Cortaderas. The Comechingones range covers a total of 100 kilometres within the borders of San Luis.The San Luis mountain range, confined to the province whose name it bears, rises up on its northern border, disappearing at punta de loos Venados near the provincial capital. This chain is 200 km long with an average altitude of approximately 1500 meters. A series of volcanic cones, such as Tomolosta and Sololosta, gives a special flavour to this mountain range.Lying to the west of the Comechingones and San Luis mountain ranges are three lesser chains: The Valle de Concarán mountains, a series of slopes to the Northwest and another to the south.The first is a scattered group- Tilisara, Estanzuela, Del Portezuelo- crowned by El Morro (1600m), whose summit is a curiously shaped, truncated cone, towering 950mts above the surrounding peaks. The mountain top is hollowed out with small volcanic cones scattered about.The next chain, on the border with the province of San Juan, is low and severely eroded. Thus, Guayaguas and Cantantal, and farther on, the impressive peak Las Quijadas, are a veritable "geological showplace", thanks to the effects of erosion over the centuries. Farther on, El Gigante rises up, along with a group of lesser offshoots, which include the fluted peaks known as the Cabras and the limestone-rich Alto Pecoso, which is currently being mined.