Canyons around Foza are characterized by the karst topography of the surrounding Asiago Plateau, featuring intricate rock labyrinths and deep gorges. This area offers a unique blend of geological formations and historical significance, particularly from World War I. The landscape includes narrow passages, tunnels, and crevices carved into limestone by water erosion over millennia. These features create an adventurous environment for exploration.
Last updated: June 2, 2026
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Highlight (Segment) • Canyon
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A simply wonderful place, easy to reach from the Carpanè-Valstagna station, following a well-marked path along the Brenta River. The staff was equally fantastic, allowing us to follow the cave tour in both Italian and English (part of my group didn't speak Italian). I recommend going in spring; it's cooler and there's usually less traffic, so you can enjoy it all better. ;)
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The Corlo lake dam blocks the Cismon stream which flows towards the Brenta river.
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Dam immersed in the narrow gorge of the Cismon torrent, completed in 1953. Crossable, cycle/pedestrian. Pleasant walk with a view and the peculiarity of ending right inside a small tunnel in the rock, which then connects to the road to Corlo, very steep!
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Super labyrinth, with all the indications that goes from narrow passages to some rocks where you have to climb, be careful that sometimes you also have to jump between the rocks and below there is a nice jump. Highly recommended 😍🤩
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Very suggestive place with beautiful passages between the rocks and beautiful panoramic views
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Very small rock labyrinth, but nice to do, be careful in winter that between fallen trees that do not allow passage and the frozen snow you risk getting hurt.
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The Corlo dam (which takes its name from the village above) was built in the years 1951-53 to dam the Cismon stream and form the artificial lake, for hydroelectric use. The area occupied today by the basin was once known as the 'Ligònt plain': a fertile area, almost entirely cultivated with corn cobs and tobacco, with several inhabited hamlets. With the construction of the dam, many towns were forcibly abandoned, demolished and submerged; others, on the eastern side, found themselves isolated from the world and soon depopulated too. This civil engineering work amazes for its dizzying height of 71m, for the construction expertise thanks to which it slips into the mountain and for the view of the very narrow Cismon canyon. The crown of the dam can also be explored by car: after the tunnel, a very narrow and winding asphalt road ends in Contrà Corlo. When the bulkheads are raised, the power of the waterfall coming down the discharge chute is impressive and spectacular! https://it.wikipedia.org/wiki/Lago_del_Corlo
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The canyons around Foza are characterized by the intricate karst topography of the surrounding Asiago Plateau, particularly the Castelloni of San Marco. This area features a natural rock labyrinth with numerous geological formations, including caves, tunnels, crevices, and deep gorges carved into limestone. It also holds significant historical importance, as many of these natural formations were adapted for military use during World War I, with trenches and walkways integrated into the landscape.
Yes, a notable hidden gem is the Labirinto del Brustolà. It's described as a wilder and more adventurous counterpart to the more famous Castelloni di San Marco, featuring towering canyons, narrow passages, and vertical walls. Another evocative geological labyrinth is the Monte Corno Rock Labyrinth, where nature has carved deep furrows into Rosso Ammonitico limestone, forming corridors through square blocks of rock, and it also contains WWI artillery emplacements.
You can expect to see a rich variety of karst formations, including deep gorges, narrow passages, and extensive rock labyrinths. The area is known for its unique geological structures, such as the Pozzo dei Castelloni, an impressive karst cave. Additionally, you can visit the Oliero Caves, where much of the water from the plateau flows, and the beautiful Oliero River.
The region's canyons and rock formations, especially the Castelloni of San Marco, played a crucial role during World War I. They were adapted by Italian troops as a second line of defense, with trenches, tunnels, stairs, and walkways integrated into the natural rock. Evidence of this past, including numbered passages and directional signs, can still be seen. The Monte Corno Rock Labyrinth also contains WWI artillery emplacements.
Yes, the Oliero Caves are considered family-friendly, offering boat trips into the caverns and a museum of speleology. The nearby Oliero River area is also a pleasant spot for families, especially on warm days. While some rock labyrinths can be challenging, reduced itineraries are often available for those with less time or who prefer easier routes.
Spring and summer are generally ideal for visiting the canyons and rock labyrinths around Foza, as the weather is milder and trails are more accessible. Spring offers cooler temperatures and less crowded conditions, which is recommended for places like the Oliero Caves. In winter, some trails, like the Monte Corno Rock Labyrinth, can be challenging due to ice and fallen trees.
Yes, the area offers numerous hiking opportunities. You can find various trails, including the challenging Calà del Sasso – The 4,444 Steps Trail, and historical routes like the Monte Fior WWI Trenches Trail. For more options, explore the dedicated guide for Hiking around Foza.
Exploring the intricate rock labyrinth of the Castelloni of San Marco, which includes many canyon-like formations, can take approximately 5-6 hours for the complete itinerary. However, reduced itineraries are often available for those who prefer a shorter experience. Other smaller labyrinths, like the Monte Corno Rock Labyrinth, can be explored in less time.
For most natural outdoor areas and rock labyrinths, such as the Castelloni of San Marco or the Labirinto del Brustolà, no specific permits or entry fees are required. However, to visit the Oliero Caves, a ticket is necessary, and entry is only allowed with a guide.
Beyond hiking, the region around Foza offers excellent opportunities for mountain biking and running. You can explore various MTB trails, such as the Casonetti of Marcesina – Monte Lisser Fort loop, or running trails like the Brenta Cycle Path loop. For detailed routes and guides, check out MTB Trails around Foza and Running Trails around Foza.
Visitors particularly enjoy the adventurous exploration through intricate rock passages, tunnels, and natural canyons, often describing it as a 'roller coaster' of cracks and narrow passages. The unique natural beauty of the geological formations, combined with the tangible remnants of World War I history, provides a rich and thought-provoking experience. The secluded and intimate character of places like the Labirinto del Brustolà is also highly appreciated.


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