Caves and Shafts of Catalonia by Major Geographic Unit

The major geographic units of Catalonia

Above the geographic unit (massif, mountain range, plain) sits the major unit: the broadest grouping used to describe Catalonia's relief -- the Axial Pyrenees, the Pre-Pyrenees, the Prelitoral Range, the Litoral Range, the Transversal Range and the Central Depression. Each major unit groups together dozens of smaller units that share a geological origin and a similar relief.

Catalogued caves by major geographic unit

How catalogued caves split across the major units: la Serralada Prelitoral, el Prepirineu, la Serralada Litoral, el Pirineu Axial, la Depressió Central and la Serralada Transversal.