Caves of Ulldecona
Ulldecona (el Montsià) has 27 cavities: 18 caves and 9 pits, with a total length of 761 m and a maximum depth of 58 m. Notable are the Avenc de l'Arion, 58 m deep, and the Avenc de les Canals.
Ulldecona has 27 catalogued caves, including 9 potholes and 18 caves. The longest is Avenc de les Canals (80m) and the deepest is Avenc de l'Arion (58m). Most caves are found in limestone.
Length adds each cave once (a system counts once), and depth is that of the deepest cave, canyons excluded.
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Ulldecona, a municipality in the Montsià, has 27 catalogued cavities: 18 caves and 9 pits. Together they total a length of 761 m and reach a maximum depth of 58 m. All the cavities develop in limestone.
Among the cavities most notable for their depth are the Avenc de l'Arion, about 58 m, explored in 1934 and relocated in 2015 by the EC Tortosa; the Avenc dels Castellets, about 52 m, explored since the 1960s and surveyed to about 40 m between 1980-83; and the Avenc de les Senioles, 21 m, with a single room of notable dimensions and an important colony of chiropterans. As for length, the Avenc de les Canals and the Avenc dels Castellets each reach 80 m, followed by the Avenc de l'Arion with 70 m and the Cova Bonica with 65 m.
Other cavities of interest are the Cova de Santa Magdalena, 56 m long and of archaeological interest, with an engraving of an anthropomorphic halteriform, and the Avenc de Julio de la Sista, 17 m deep, with a narrow entrance, a 10 m shaft and a room with formations, visited in December 2018.
Map
The 20 longest
- 1Avenc de les CanalsUlldecona, Tarragona80 m
- 2Avenc dels CastelletsUlldecona, Tarragona80 m
- 3Avenc de l'ArionUlldecona, Tarragona70 m
- 4Cova BonicaUlldecona, Tarragona65 m
- 5Cova de Santa MagdalenaUlldecona, Tarragona56 m
- 6Avenc de les SeniolesUlldecona, Tarragona55 m
- 7Avenc de Julio de la SistaUlldecona, Tarragona45 m
- 8Avenc del CastellUlldecona, Tarragona35 m
- 9Avenc de la Mola de la TorreUlldecona, Tarragona32 m
- 10Avenc del Camí de les SeniolesUlldecona, Tarragona28 m
- 11Cova de les BruixesUlldecona, Tarragona25 m
- 12Cova del PastorUlldecona, Tarragona25 m
- 13Cova del PiUlldecona, Tarragona20 m
- 14Cova del PuigUlldecona, Tarragona18 m
- 15Cova del Pare PasqualUlldecona, Tarragona12 m
- 16Abrics d'Ermites de la PietatUlldecona, Tarragona10 m
- 17Avenc RogerUlldecona, Tarragona10 m
- 18Cova de la FigueraUlldecona, Tarragona10 m
- 19Cova del GallUlldecona, Tarragona10 m
- 20Cova del Lligallo de Roca RojaUlldecona, Tarragona10 m
The 20 deepest
- 1Avenc de l'ArionUlldecona, Tarragona58 m
- 2Avenc dels CastelletsUlldecona, Tarragona52 m
- 3Avenc de les SeniolesUlldecona, Tarragona21 m
- 4Avenc de les CanalsUlldecona, Tarragona20 m
- 5Avenc de Julio de la SistaUlldecona, Tarragona17 m
- 6Avenc de la Mola de la TorreUlldecona, Tarragona17 m
- 7Avenc del CastellUlldecona, Tarragona14 m
- 8Cova BonicaUlldecona, Tarragona12 m
- 9Avenc RogerUlldecona, Tarragona8 m
- 10Cova de Santa MagdalenaUlldecona, Tarragona8 m
- 11Avenc del Camí de les SeniolesUlldecona, Tarragona6 m
- 12Cova del PuigUlldecona, Tarragona5 m
- 13Cova de les BruixesUlldecona, Tarragona2 m
- 14Cova del Pare PasqualUlldecona, Tarragona2 m
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Source: Espeleoindex (espeleoindex.com), modified. CC BY-NC 4.0, https://creativecommons.org/licenses/by-nc/4.0/