Geosites in Trentino

It opens above the village of Sporminore, just beyond Val Goslada, near Castel Sporo-Rovina, and is one of the oldest known natural caves in Trentino. It was mentioned as early as the beginning of the 17th century by Marx Sittich von Volkenstein in his 'Landesbeschreibung von Südtirol' (Description of South Tyrol), although he merely describes it as '... a large hole that seems to go far underground but which no one has ever trusted to enter ...'. In all likelihood, only the initial part of the cave was known at the time, considering the peculiar funnel-like morphology of the first section and, perhaps, the clogging of large pebbles that probably still obstructed the next narrow tunnel.

It opens about 30 metres above the eastern shore of the Lamar pond (Terlago). The initial part consists of a high, narrow meander interrupted by three small (6-8 m), rather muddy jumps. Approximately 200 m from the entrance, the gorge flows into the imposing Pozzo Trieste, 10-20 m in diameter and 154 m deep (for years considered the bottom of the Abisso, -209 m).

The large subtriangular entrance sinks for several metres between various landslide blocks of considerable size (diameter in the order of several metres). Seen from the front, the entrance is 6 metres high by 5 - 6 metres wide; seen in plan, it is 9 metres long by about 6 - 7 metres wide. A second cavern to the left of the main one is bordered by a small wooden protection as it sinks almost vertically for a few metres with narrower dimensions (diameter 1.0 - 1.5 metres).

Discovered during the excavation of the Lago di Molveno-S. Massenza (Vallelaghi) hydroelectric tunnel, it has no natural entrances and can only be accessed from inside the artificial conduit, therefore only during maintenance periods of the latter (so far only three times since the year of its construction, 1954).

The natural entrance opens up on the eastern slope of Col Alto (southern Brenta Dolomites), at the beginning of Val d'Ambiez, in the municipality of Dorsino.

It opens up with various entrances on the eastern slope of Paganella, in the Becco di Corno wall, above Val Trementina (Municipality of Zambana).
The development detected is 2340 m; height difference from the entrance: -182 m (Grotta del Capo) / +22 m (Cripta).

The cave known as 'La Camerona', included in the cadastre of natural cavities of the Province of Trento under number 120 VT (Venezia Tridentina), is located near the locality of Ballino, in the municipal territory of Fiavé, in central-southern Trentino. Although it is not very large, especially when compared to the largest karst complexes in Trentino (it measures around one hundred metres in length), it has always been the object of interest for enthusiasts, hikers and tourists due to the considerable size of the entrance, which is clearly visible to those travelling from state road no. 421 and the village of Ballino.

Grotta della Bigonda is an active karstic complex that has been under constant exploration since the early 1950s due to the dozens and dozens of siphons in series that only allow access to the innermost parts in the period from January to March each year. The entrance itself is always closed by water, and its emptying by means of fixed tubes by the cavers of Selva di Grigno generally takes about 48 hours.

The gorge has the appearance of a veritable 'canyon' and has a depth of about 100 metres and a variable width, in the middle and lower reaches of the incision, of about 10 to 15 metres, with a slightly sinuous course determined by progressive fluvial erosion over time and variations in the speed of the current.