This massif is composed of a number of mountain ranges located on the left side of the Ebro river near Tortosa.

The ranges cover an area of over 340 km2, extending from Rasquera in the north, to Benifallet in the south and eastwards through El Perelló until reaching the Mediterranean Sea between L'Ampolla and L'Ametlla de Mar.

In the late 19th century the monastery was transformed into a spa, which became a very successful place among the Catalan elite until the Spanish Civil War.

Recently there was a project to transform the ruined former monastery and spa premises into a luxury resort, but the current financial crisis in Spain thwarted the plans.

The small abandoned hermitages scattered about the area close to the former monastery, some of them perching atop karstic rock needles, are popular with hikers.