Grotte di Font-rubí

The municipality of Font-rubí, in Alt Penedès, has 12 cavities, all catalogued as caves and developed in limestone. Together they total 128 metres of length and reach a maximum depth of 5 metres.

Cova de l'Omella is the longest cavity, at 21 metres, and also the deepest, at 5 metres; it has been known since time immemorial and was visited in 1957 for biospeleological purposes. It is followed in length by Cova de l'Arena and Cova de la Guineu, both 20 metres; Cova de la Guineu is an archaeological site with materials from the Palaeolithic to the Roman period, while Cova de l'Arena is an artificial cavity probably enlarged from some small natural conduit. Other notable cavities are Cova Superior del Joncar, at 13 metres, and Cova del Pastor, at 10 metres, used to keep livestock until the middle of the 20th century.

Among the cavities of shorter length is Cova de Can Manel de l'obaga, at 5 metres, with an entrance 1.9 m high by 5 m wide and an interior chamber.