A small forat bufador at the edge of a path had been known for some time by members of the group Els Gafarrons – Amics de la Caminada de Sant Martí de Centelles i Aiguafreda. In May 2008, two members of this group, the brothers Antoni and Pere de Arriba, removed some blocks that were blocking the passage and were able to penetrate a few metres. At the beginning of 2010, Francesc Casanellas, also of the Gafarrons, got in contact with the ERE – CEC and on 30 January 2010 accompanied two members of the ERE to the cavity, carrying out the complete exploration and survey.

Since in winter a strong current of warm air comes out of the mouth, the friends from Aiguafreda decided to name it cova de l'Infern.

In October 2012, a group made up of members of the GEB, SIE-CEA, ECG and SES – Ger visited the cavity again and made a new survey, while exploring some new and small passages. They refer to the blog of the historian and hiker Francesc Roma, where he refers to the cavity while expressing the opinion that the most correct name would be Avenc de la Vinya Boja, due to its location, and also explains that around the year 2006 he communicated its existence to speleologists of the GIEG (Granollers) and presumes that they explored it at that time. We doubt this, since the Gafarrons d'Aiguafreda had work to do to clear the access to the cavity and no trace of a previous exploration was visible. For the same reason, we keep Cova de l'Infern as the main name, which is how this forat has always been known in Aiguafreda, and include the other as a synonym to avoid confusion.

Chilopoda / Lithobiomorpha / Lithobiidae

• Lithobius sp.

Insecta / Coleoptera / Leiodidae /

• Parvospeonomus cruillensis (Comas, 2021)

Insecta / Orthoptera / Rhaphidophoridae

• Dolichopoda (Dolichopoda) linderii (Dufour, 1861)

(Source of the data: Dept. Artròpodes del Museu de Ciències Naturals de Barcelona)