Caves and potholes of Piedmont

The catalogue of Piedmont lists 2,607 caves, including 512 potholes and 1,829 caves. The longest is Piaggia Bella (Carsena di) (43,000 m) and the deepest is Grotta di Piaggia Bella (961 m).

2,607 caves

491.9 km total length

961m max depth

Length adds each cave once (a system counts once), and depth is that of the deepest cave, canyons excluded. Without length data: 286. Without depth data: 432. Without known lithology: 2,607.

Data as of November 9, 2026

The 20 longest

The 20 longest
#	Cave	Location	Length
1	Piaggia Bella (Carsena di)	Briga Alta, Cuneo	43,000 m
2	Grotta di Piaggia Bella	Briga Alta, Cuneo	35,500 m
3	Grotta della Mottera 1	Ormea, Cuneo	22,279 m
4	Grotta della Mottera 3	Ormea, Cuneo	22,279 m
5	Grotta della Mottera	Ormea, Cuneo	22,279 m
6	Grotta della Mutera 4° Ingresso	Ormea, Cuneo	22,279 m
7	Abisso Cappa	Briga Alta, Cuneo	16,000 m
8	Labassa	Briga Alta, Cuneo	14,000 m
9	Grotta Beppe Bessone	Frabosa Soprana, Cuneo	10,839 m
10	Abisso John Belushi	Briga Alta, Cuneo	7,500 m
11	Abisso Parsifal	Chiusa di Pesio, Cuneo	6,500 m
12	Grotta delle Vene	Ormea, Cuneo	6,285 m
13	Abisso Bacardi	Frabosa Soprana, Cuneo	5,500 m
14	Grotta del Regioso	Ormea, Cuneo	5,430 m
15	Abisso Valmar	Briga Alta, Cuneo	5,220 m
16	Abisso F-5 del Marguareis	Briga Alta, Cuneo	5,000 m
17	O-Freddo	Chiusa di Pesio, Cuneo	5,000 m
18	Grotta delle Vene	Ormea, Cuneo	4,700 m
19	Abisso Ventazzo	Garessio, Cuneo	4,641 m
20	Abisso Sardu	Roccaforte Mondovì, Cuneo	4,500 m

Full ranking: longest caves in Piedmont

The 20 deepest

The 20 deepest
#	Cave	Location	Depth
1	Grotta di Piaggia Bella	Briga Alta, Cuneo	961 m
2	Piaggia Bella (Carsena di)	Briga Alta, Cuneo	961 m
3	Abisso Cappa	Briga Alta, Cuneo	788 m
4	Pozzo A-11 del Marguareis	Briga Alta, Cuneo	680 m
5	Grotta Ombelico del Margua	Briga Alta, Cuneo	650 m
6	Labassa	Briga Alta, Cuneo	650 m
7	Grotta Luna d'Ottobre	Ormea, Cuneo	641 m
8	Abisso Gaché	Briga Alta, Cuneo	638 m
9	Grotta della Mottera 1	Ormea, Cuneo	636 m
10	Grotta della Mottera 3	Ormea, Cuneo	636 m
11	Grotta della Mottera	Ormea, Cuneo	636 m
12	Grotta della Mutera 4° Ingresso	Ormea, Cuneo	636 m
13	Abisso dei Grassi Trichechi	Briga Alta, Cuneo	546 m
14	Abisso Perdus	Briga Alta, Cuneo	539 m
15	Abisso Libero	Chiusa di Pesio, Cuneo	525 m
16	Abisso Ventazzo	Garessio, Cuneo	517 m
17	Abisso E-103 del Marguareis	Briga Alta, Cuneo	509 m
18	Abisso F-5 del Marguareis	Briga Alta, Cuneo	507 m
19	F-33 del Marguareis	Briga Alta, Cuneo	507 m
20	Abisso Valmar	Briga Alta, Cuneo	480 m

Full ranking: deepest caves and potholes in Piedmont

Provinces

Cuneo

1,909 caves

458.3 km

961m

🏆 Longest: Piaggia Bella (Carsena di) (43,000m)

⬇️ Deepest: Grotta di Piaggia Bella (961m)

Torino

332 caves

9.5 km

130m

🏆 Longest: Grotta del Pugnetto (765m)

⬇️ Deepest: Caverna Gigante (130m)

Verbano-Cusio-Ossola

131 caves

9.6 km

211m

🏆 Longest: Complesso del Monte Massone (2,188m)

⬇️ Deepest: Complesso del Monte Massone (211m)

Vercelli

93 caves

9.5 km

143m

🏆 Longest: Grotta della Arenarie (3,000m)

⬇️ Deepest: Grotta della Arenarie (143m)

Biella

64 caves

1.0 km

17m

🏆 Longest: Grotta di Tassere (237m)

⬇️ Deepest: Grotta di Bercovei (17m)

Novara

50 caves

827 m

34m

🏆 Longest: Boecc d'la Cuscia (224m)

⬇️ Deepest: Beante (La) (34m)

Alessandria

27 caves

1.7 km

107m

🏆 Longest: Tana di Morbello (357m)

⬇️ Deepest: Pozzo del Negrin (107m)

Asti

1 cave

1.5 km

30m

🏆 Longest: Grotta di Moncalvo (1,500m)

⬇️ Deepest: Grotta di Moncalvo (30m)

The figures of these places do not add up to the total: a cave can be in more than one place, or in none when its location has no lower level.

Contains information from Grottocenter (Wikicaves), grottocenter.org, made available under the Open Database License (ODbL 1.0, https://opendatacommons.org/licenses/odbl/1-0/), modified. · The derived data is available on request under the ODbL: [email protected]