Best caves in Belluno are found within the Dolomites, offering a range of subterranean experiences. The region features diverse geological formations, from karst sinkholes to natural grottoes and historical war tunnels. These sites provide insights into both natural processes and human history. Belluno's caves present varied exploration opportunities for visitors.
Last updated: August 7, 2026
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The Cansiglio Forest hides a myriad of sinkholes, pits, and swallow holes of all sizes, due to the karst morphology of the territory: the rain dissolves the limestone rock, slowly but inexorably forming these natural chasms and fissures on the ground. The Bus de la Lum is an abyss characterized by a single large vertical entrance shaft 180m high, which then develops into a very large and articulated underground complex. The depth of the shaft is best appreciated out of season, because in summer the lush vegetation tends to partially obscure the view. According to ancient beliefs, it is the dwelling of the Anguane or Anduane, fierce and evil witches, toothless, with long rusty nails instead of hair and sharp fangs, who kidnapped and ate children! They gathered at the bottom of the cave, lighting fires, whose glows rose to the surface, visible at night to the shepherds of the area: hence the name 'Buco della Luce' (Hole of Light). In reality, the legend has a grain of truth: on hot summer nights, will-o'-the-wisps could indeed be formed by the decomposing carcasses of livestock dead from illness, which it was customary to throw into the Buso. During World War II, the cavity was sadly used by partisans as a foiba, to dispose of the bodies of fascists and nazis, but also of civilians: over the years, several bodies and bones have been found during explorations. https://it.wikipedia.org/wiki/Bus_de_la_Lum
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Built in the last two decades of the 19th century, under the Kingdom of Italy, the Forte di Monte Ricco constituted the heart of the entrenched camp of Pieve di Cadore. It was conceived and built to interdict enemy approaches from the Tre Ponti narrows towards Pieve and Tai along the Piave valley and to act in close synergy with the nearby Batteria Castello, about 200 meters away, as well as with the various artillery positions on the overlying heights, on Monte Tranego, Monte Zucco, Col Vidà. Monte Ricco was probably the site of a prehistoric settlement, then of the castle of Cadore. Abandoned until 2007, it has undergone demanding restoration, consolidation, and enhancement works. Reopened to the public in 2017, it hosts exhibitions or classical music concerts. https://www.tizianovecellio.it/luoghi/il-forte-di-monte-ricco/
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Wonderful panoramic viewpoint overlooking the Falzarego Pass.
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A truly worthwhile detour – first a short way up the gully and then along the ledge (with a cable) to the grotto. Inside the grotto, you can take a walk through the tunnels – bring a headlamp.
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Looking back along the path which leads from Refuge Dabona
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The name probably derives from "lume" or flame, due to the luminescence that would have been seen on summer nights above the cavity, produced by the gases generated by the putrefaction of animal carcasses thrown into the well. The cavity was formed by karst, or by the dissolution of the rock by water. According to legend, it is inhabited by the Anguane, very ugly fairies, with nails instead of hair, and long fangs instead of teeth. During the day they went to wash clothes at Lake Santa Croce, then wandered around in search of wood, food and children to roast. At night, they lit a small fire, whose light, spotted by shepherds, gives the cavity its name
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The grotto is located above the Dibona hut in the direction of the Lipella via ferrata. The entrance to the secured access to the grotto goes off to the right and up a gully. At the end of the gully you will find the first safety devices. There is a circular path in the grotto that is really worth it. Don't forget your headlamp!
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Belluno's caves offer deep historical insights. The Lagazuoi Tunnels were created by Italian soldiers during World War I and are now open to visitors, equipped with ropes and gear. Similarly, the Kaiserjägersteig Trail features tunnels that were vital connection roads during the First World War. The Bus de la Lum Sinkhole also holds a tragic history from the Second World War.
Yes, the region boasts unique geological features. The Grotta di Tofana, located in the Tofane group, is notable as one of the few natural caves formed in dolomite rock rather than typical limestone. It extends approximately 300 meters deep with a roof up to 10 meters high.
For those seeking a challenge, the Grotta di Tofana is accessible via a via ferrata. The Lagazuoi Tunnels are classified as a beginner via ferrata and require a headlamp or flashlight, with a helmet also recommended. The Grotta dell'acqua nera, with its intricate network of underwater cavities, is reserved for experienced cave divers.
Yes, the Bus de la Bela is particularly interesting for its paleontological significance. Remains of Ursus spalaeus (Cave Bear), a large mammal from the Pleistocene epoch, have been discovered there, offering a glimpse into ancient ecosystems.
For caves like the Grotta Azzurra, visiting in late spring or early fall is recommended to enjoy the views more tranquilly and appreciate its turquoise waters. Generally, these periods offer pleasant weather for exploring the surrounding areas as well.
While many caves in Belluno can be challenging, the Old Road of the Cismon Gorge offers a route that includes a cave section and is considered family-friendly, providing a suggestive experience along a deep gorge.
The Grotta Azzurra, located in Borgo Valbelluna, is famous for its stunning turquoise-colored, crystal-clear water, creating a 'small corner of paradise.' The Bus del Buson is another natural spectacle, a fossil canyon carved by water in the Ardo valley.
The Belluno region, home to these caves, is excellent for various outdoor activities. You can find numerous Mountain Hikes, including challenging routes like the 'Lagazuoi Hut – Entrance to the Kaiserjäger Path loop'. There are also extensive MTB Trails and Road Cycling Routes throughout the Dolomites.
Yes, the Goiginger Tunnel on the Hexenstein is another significant World War I site. Named after Field Marshal Ludwig von Goiginger, this 500-meter tunnel crosses almost the entire east wall of the Hexenstein horizontally and can be explored with the right equipment.
The Grotta dell'acqua nera features a large entrance hall leading to a deep, dark opening. An underground stream flows into an intricate network of underwater cavities, making it a site primarily for experienced cave divers. Its name, meaning 'black water,' likely comes from the dark, moss-covered floor over which the clear stream flows.
Visitors appreciate the diverse experiences offered by Belluno's caves, from the historical significance of the World War I tunnels to the unique geological formations and paleontological findings. The opportunity to combine cave exploration with hiking and other outdoor activities in the stunning Dolomites is also a major draw.


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