Caves around Malo, Italy, are primarily located in the Veneto region, characterized by a karst landscape with significant underground formations. The area features the Faedo-Casaròn Plateau and Mount Summano, where rainwater has eroded limestone to create complex cave systems. These natural features are often intertwined with historical sites, including World War I fortifications and cave shelters. The region offers a diverse range of subterranean explorations, from extensive natural caves to smaller karst cavities.
Last updated: June 30, 2026
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The Buso della Rana is the largest cave in the Veneto region and one of the most extensive in Italy, with a network of caves stretching almost 30 km in total (40 km including the Pissatèla complex above, to which it is connected). Located beneath the Faedo-Casaròn Plateau, it is an intricate karst system that collects and channels the plateau's waters into the Rio Rana, which flows at the entrance. It was formed when rainwater seeps into the permeable limestone surface layer and, encountering the underlying impermeable basalt (volcanic rock), flows laterally, eroding the rock. Over millions of years, this has created a complex labyrinth of horizontal tunnels, chambers, chimneys, siphons, and small lakes traversed by underground streams. Because it drains the plateau's waters, the cave is subject to flash floods, making exploration treacherous. Inside, the temperature remains constant between 10 and 12°C year-round. It is freely accessible through the monumental entrance and by proceeding along the Main Branch for about fifty meters, until reaching the first flooded corridor or Siphon, a horizontal constriction that requires crawling. From there, it is the preserve of speleologists or exciting and adventurous guided tours organized by associations like Biosphera (see link). The internal branches are not marked, and one must know the way. The name of the cave has nothing to do with the amphibian, but is an Italianized term from the Cimbrian word "roan," meaning "rocky wall," referring to the cliff at the entrance. https://www.busodellarana.it https://esplora.biosphaera.it/luoghi/buso-della-rana/
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This path runs along a long and steep edge of the Civillina, but the climb is greatly eased by a large number of hairpin bends (42) and therefore is never difficult or too tiring. It is called the Sentinello because it is nothing more than a mule track that connected all the firing positions of the Great War along its entire length.
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beautiful waterfall of the Rana stream
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To admire this curious phenomenon, a detour from the main road is necessary. Once you reach the place, just look out into the well (with a diameter of about 50 cm) from which what is sometimes called "dragon's breath" seems to emerge from. It is nothing more than a karst cavity (characteristic of the Faedo-Casaron plateau) from which fresh air comes out (which varies between 7 and 13 degrees). Especially in the summer period, the typical rustle of the exchange of hot and cold air masses at the mouth of the cave is clearly audible. The cavity, commonly called "Buso del Lucio", was discovered by the Maladense speleologist Lucio Zanini. The valley that you travel along following the Campipiani-Faedo path is called “Valle dei Vischi”. The origin of this name is not known but it probably refers to the sound effects (breathing, hissing, moaning) that the blowing caves produce in particular climatic conditions.
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The Bocca Lorenza is nothing more than a cave (which if I'm not mistaken is also used for speleology) be careful not to go too far because you risk slipping
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The Bocca Lorenza cave is a natural cavity that enters the bowels of the Summano and descends into a series of rooms located at increasing depths. Since the early years of the twentieth century, excavations have been carried out which have brought to light numerous finds dating back mainly to prehistoric times, which testify to its use as a domestic shelter, tomb and place of worship. The interior of the cave can be freely visited and equipped with cables (perpetually wet due to humidity), but experience and adequate equipment are still required: a headlamp and helmet are essential. For everyone else, it's best to stop at the lobby. The cave is very humid and dark, with a slippery bottom and a constant temperature of around 13 degrees. https://it.wikipedia.org/wiki/Bocca_Lorenza https://mostre.cab.unipd.it/schio/it/63/i-reperti-di-bocca-lorenza
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Sass de la Poja ('Sasso della Buzzard', the bird of prey, in Venetian dialect) is a large boulder that stands alone on the south-eastern side of Summano. During the Great War, the Italian army dug an observatory there to monitor the Vicenza Plain. Further down, another rock strut with another observatory. However, the entire short path is fortified with short trenches and reinforcement walls, a couple of cave shelters and walkways: a suggestive and interesting passage through the woods.
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Small rock pillar (with a short ferraratina to get to the top) overlooking a First World War stronghold carved into the same rock
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The caves around Malo are primarily located in a karst landscape, featuring intricate systems formed by rainwater eroding limestone. You'll find a complex labyrinth of horizontal tunnels, chambers, chimneys, siphons, and small lakes traversed by underground streams. The region's geology includes permeable limestone and underlying impermeable basalt, which influences the cave formations.
Yes, Lucio's Hole is a notable karst cavity known for emitting cool air, sometimes referred to as 'dragon's breath.' This phenomenon is particularly noticeable in summer, with a distinct rustling sound from the exchange of hot and cold air masses. The air temperature inside this cavity typically ranges between 7 and 13 degrees Celsius.
The region's caves are often intertwined with historical sites. For example, the Sentinello Trail (WWI) features numerous military artifacts dug into the rock, including observatories, artillery emplacements, and cave shelters from the Great War. Similarly, the Sass de la Poja Observation Post is a WWI stronghold carved into rock, also containing cave shelters.
Yes, Bocca Lorenza (cave), located on Mount Summano, has been the site of archaeological excavations. These have revealed numerous finds, mainly from prehistoric times, indicating its use as a domestic shelter, tomb, and place of worship.
The caves maintain a relatively constant temperature year-round. For instance, Buso della Rana Cave stays between 10 and 12°C, and Bocca Lorenza (cave) around 13°C. Summer can be a good time to visit for a cool escape, especially to experience phenomena like the 'dragon's breath' at Lucio's Hole. However, be aware that some caves, like Buso della Rana, are subject to flash floods, making exploration treacherous during heavy rainfall.
For caves like Bocca Lorenza (cave), while freely visitable, experience and adequate equipment such as a headlamp and helmet are essential due to wet cables, slippery surfaces, and darkness. For extensive systems like Buso della Rana Cave, beyond the initial 50 meters, it is the preserve of speleologists or requires exciting and adventurous guided tours organized by associations like Biosphera. Always check specific requirements for each cave you plan to visit.
While some caves require specialized equipment and experience, the initial sections of certain caves, like the first 50 meters of Buso della Rana Cave, can be freely accessed and offer a glimpse into the underground world. For a less demanding experience, exploring the historical cave shelters along trails like the Sentinello Trail (WWI) might be suitable for families interested in both nature and history.
The area around Malo offers a variety of outdoor activities. You can find numerous hiking trails, including moderate options like the 'Monte Pian panoramic loop from San Tomio' or the 'View of Malo – Chiesetta di San Valentino loop from Malo'. There are also extensive routes for cycling and mountain biking. For more details on these activities, you can explore the Hiking around Malo, Cycling around Malo, and MTB Trails around Malo guides.
Yes, some hiking routes in the area integrate cave features. The Sentinello Trail (WWI), for instance, is a historical path that includes military artifacts and cave shelters dug into the rock. This allows for a combination of hiking with exploration of historical cave structures. You can find more hiking options in the Hiking around Malo guide.
Visitors appreciate the diverse range of subterranean explorations, from extensive natural cave networks to smaller, intriguing natural phenomena. The historical context, particularly the World War I fortifications and cave shelters, also adds a unique dimension. The natural beauty and the geological significance of the karst systems are frequently highlighted by those who explore the area.
Yes, the Buso della Rana Cave is the largest in the Veneto region and one of Italy's most extensive, with a network stretching almost 30 km. While the monumental entrance and the first fifty meters of the Main Branch are freely accessible, further exploration into its complex labyrinth of tunnels and underground streams is typically reserved for speleologists or requires guided tours due to its challenging nature and susceptibility to flash floods.
For beginners or those seeking easier access, the initial sections of some caves, such as the first 50 meters of Buso della Rana Cave, are freely accessible. These offer a taste of the underground environment without requiring specialized caving skills or equipment. Additionally, exploring the external features and historical cave shelters along well-maintained trails like the Sentinello Trail (WWI) can be a good starting point.


Extend your search for the best caves by checking out these guides of the top ones around Malo: