Bounded approximately by the Laguna del Monte, Guaminí at its northwestern end and the Atlantic Ocean to its southwest, the Sierra de la Ventana lies on a precambrian base formed around 2.2 billion years ago, and is interspersed with granite, granodiorite, and amphibole deposits.

Characterized by its escarpments, this orography prevented the deposit of significant amounts of loess, and made the area the least propitious for agriculture within the Pampas; sunflower fields are common along the foot of the range.

[citation needed] Peppered by caves and grottoes, the range is relatively modest in height and extension, and exceeds 1000 m (3280 ft) at only six points.

These peaks are: British naturalist Charles Darwin described his ascent of the Sierra de la Ventana range in the sixth chapter of his work The Voyage of the Beagle.

The hotel closed after President Hipólito Yrigoyen's 1918 edict banning gambling, and development of the area's tourism resources remained below their potential in subsequent decades.