Best caves around Asso are situated in the Larian Triangle, a region known for its diverse geological formations between the Como and Lecco branches of Lake Como. This area features a landscape shaped by ancient oceans and glacial activity, resulting in numerous natural cavities. The caves near Asso offer insights into geological processes and historical human activity. The region provides opportunities to explore various underground environments.
Last updated: June 29, 2026
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This place was undoubtedly the "highlight" of this stage! Already arriving in the valley, you get the impression of entering another world, literally: the Grigne mountains loom, almost vertical, closing off the valley, the steep road descending towards the stream becomes a small path, the vegetation becomes dense... almost a jungle. finally, you arrive at this spectacular cave, a natural bridge, a very cool place where it is mandatory to stop... also because, immediately after, you climb a very steep staircase!
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October 2025: The trail is closed by a gate but still worth a visit
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it is found on the path to Sasso di Preguda
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natural cave with the presence of a fountain
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Beautiful pools with crystal clear water. Trail 15b (Lake Trail) repeatedly crosses the stream, often with fixed chains; waterproof boots are highly recommended, especially in the less warm months.
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The Mother of God depicted and venerated here is the one from Lourdes. This well-known Marian pilgrimage site is located in the French Pyrenees and is visited by many people every year, including many sick people who hope for healing. The devotional image of the Mother of God has become widespread - not only in France - and believers have built Lourdes chapels and grottos everywhere. The church's memorial day for "Our Lady of Lourdes" is on February 11th, the anniversary of the apparition of the Virgin Mary (1858), when the Mother of God appeared to 14-year-old Bernadette Soubirous in a rock grotto very close to Lourdes. Bernadette later became a nun and died at the age of just 35. On December 8th (the Feast of the Immaculate Conception of Mary) 1933, she was canonized by Pope Pius XI. The commemoration of the Madonna of Lourdes is also World Day of the Sick.
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Spectacular, highly recommended, the path along the river has some chains
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The caves around Asso, located within the Larian Triangle, offer a variety of geological formations. You can find natural river-carved passages like the Meria Stream Cave, large karst cavities such as Buco del Piombo, and historically significant sites like Ferrera Cave, which was once used for iron extraction.
Yes, several caves in the region have historical importance. The Ferrera Cave, for instance, was historically used for the extraction of iron hydroxides. Additionally, the Buco della Sabbia Cave is a funerary cave with evidence of ancient human settlement, including traces of bones, tools, and graffiti dating back to the third millennium BC.
You can observe various natural phenomena. The Meria Stream Cave features a river slowly flowing into a passage carved by water. Ferrera Cave is notable for its collapse room with gigantic boulders detached from the ceiling. The Buco del Piombo is a massive karst cavity, 45 meters high and 38 meters wide, formed by millions of years of rain action on sedimentary rock.
While direct information about prominent caves specifically within Asso is limited, the nearby Meria Stream Cave is popular and accessible after a steep descent. For a more extensive and well-known system in the broader Lake Como region, the Grotte di Rescia, located near Lake Lugano, offers a 500-meter-long route to explore natural formations and is open to the public from April to September.
The region around Asso is excellent for various outdoor activities. You can find numerous hiking trails, such as the Monte Megna loop or the Spaccasassi Naturalistic Trail. For cyclists, there are MTB trails like the route from Lago del Segrino to Monte Cornizzolo, and road cycling routes including the Nesso Gorge loop. You can find more details on these activities in the Hiking around Asso, MTB Trails around Asso, and Road Cycling Routes around Asso guides.
Yes, the Grotto of Our Lady of Lourdes is a notable religious site in the area. It is a rock grotto dedicated to the Mother of God from Lourdes, a well-known Marian pilgrimage site. This grotto is found on the path to Sasso di Preguda and serves as a place of devotion.
The Grotte di Rescia, located in Claino con Osteno above Lake Lugano, is known for its intricate stalactites and stalagmites. It features an approximately 500-meter-long route and is open to the public from April to September during the afternoon. A visit also offers the chance to see the impressive Orrido of Santa Giulia, a canyon with a 70-meter-high waterfall.
Visitors appreciate the natural beauty and tranquility of these sites. For example, the Meria Stream Cave is described as an 'oasis of peace' where you can soak your feet and rest. The community has documented these sites with over 90 photos and 240 upvotes, highlighting their appeal for natural exploration and historical interest.
Some caves offer more challenging experiences. The Buco del Piombo is described as challenging, and its entrance is theoretically forbidden due to its nature as an intricate system of tunnels. For those seeking adventure, these types of karst formations can provide a more demanding exploration.
Yes, some locations offer opportunities for a brief stop. The Meria Stream Cave has small areas next to the river where you can stop, soak your feet, and rest, especially after the steep descent to reach it.
The Larian Triangle, where Asso is located, is characterized by a landscape shaped by ancient oceans and glacial activity. This results in numerous natural cavities, including karst formations like the huge Buco del Piombo, which was formed by the action of rain on sedimentary rock over millions of years. You'll find evidence of water erosion and collapse chambers.
The caves in the region, particularly those of karst origin, feature unique rock formations. While specific names for formations aren't detailed for all Asso caves, the Ferrera Cave is known for its gigantic boulders within a collapse room. The Grotte di Rescia, nearby, is renowned for its intricate stalactites and stalagmites sculpted by water over time.


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