Grotte di Alt Empordà

Alt Empordà contains 95 recorded cavities: 59 caves and 36 pits, with a total passage length of 3335 metres and a maximum depth of 73 metres. The dominant lithology is limestone, present in 77 cavities, followed by schist in 9, travertine in 3, granite and sandstone in 2 each, and slate and sand in 1 each.

Cau del Lliri, in Roses, is the longest and deepest cavity, with 460 metres of passage and 73 metres of vertical drop, divided into five levels connected by a system of shafts and ramps. Forat del Ginebret, at the Tossa d'Espinau (Albanyà), reaches 55 metres of depth and 296 metres of passage; located in 1983, it was explored in 1988 and surveyed in 1997. Avenc de la Calma, in Llers, reaches 52 metres of depth and includes the Sala Gran, measuring 15x6 metres, with two routes, the CEE and the GEIS.

Other notable cavities are Cova de la Xinxa, an underwater tunnel with several branches at l'Escala, and the Forats de la Tossa d'espinau Nº1-3, a pit 22 metres deep in Albanyà explored by the GEB on 17 April 1993.