Behind the cabin, a trail climbing slightly uphill leads to the entrance of an extensive multi-level tunnel network, used both by Italian and Austro-Hungarian troops. This area includes a number of shelters, ammo reserves and a gun pointed towards Mt. Santo. Visitors can access a trench provided with slits through some stairs, while a second cannon position was built by the Italians to try taking Mt. Vodice after August 1916.
Back to the cabin, you can observe a tunnel on the left wall of the mountain, now closed by a metal gate. This is the so-called "Water Gallery". The name comes from a water supply kept inside, still very well-preserved, which was diverted directly from the Isonzo through some pipes.
To complete your visit to this section of the Park, take the third trail (leading to the summit) and, after a few minutes, you will reach another tunnel heading to the other side of the mountain. On the left, some steps downhill run parallel to the Cave of the 8 guns and lead to the cableway arrival station, which would connect the summit with the right banks of the Isonzo, near the railway. Three more tunnels dug by the Austro-Hungarians open up a few steps downhill; they were used as shelters for soldiers and water reserve for the command. Two additional tunnels complete this extensive network, including a kitchen and the Command post, surrounded by smaller posts, an ammo reserve and an anti-aircraft gun pit.
