Our journey takes us back 42 million years, when this territory was covered by a warm sea, similar to the Caribbean, which here was closed forming a gulf that opened towards the Atlantic, towards the west.

For millions of years, mighty rivers formed extensive deltas, which correspond in part to the relays of the current Natural Parks of Montserrat and Sant Llorenç del Montón, while towards the village of Moià, a quieter coastal area, the coral reefs could be fully developed. It was on those rocks 38 million years ago that the Toll caves were formed, in a process that still continues today.

When the sea began to retreat, pushed by the rising of the Pyrenees, now more than 36 million years ago, there was intense evaporation that caused the precipitation of chalk first (between the towns of Artés and Calders) and then, in the deeper area (where the towns of Súria and Cardona are now located), salts such as common salt (halite) and potash (sylvite).

Finally, the sea disappeared forever and was replaced by lakes and rivers, identifiable in the landscape by the reddish colouring of their rocks.

In this journey through time you will discover impressive caves, wetlands, an abandoned meander, lime kilns, the spectacular Migmòn Fault, and the whole traditional mining complex of chalk exploitation and active potash extraction in the surroundings of Súria.

The route we suggest will allow you to enjoy:

• The remains of this sea in Súria.
• The nature of the Bòbila wetlands in Santpedor.
• Contemporary art in the restored Forn de la Calç in Calders.
• From the unique landscape of the Calders Meander.
• To the spectacular Toll caves in Moià.