The summit of Mt. Freikofel is the core of the open-air museum, as you can find plenty of traces, remains and ruins testifying the battles that were fought here. Even before you reach the mountain top, CAI trail No. 413 follows and crosses the remains of some trenches leading to the northern side of the mount. In particular, you can clearly see some machine-gun pits surrounded by cement walls and the slits facing the enemy lines.
Yet, the complexity of the whole military system can only be appreciated from the summit. The trenches excavated in the rocks all lead to machine-gun pits and are interspersed with openings of artificial tunnels that allowed soldiers to fight more safely. Quite significant are the cement walls of the so-called "Shielded Italian Trench", which overlooks the whole valley below and from where the Italians were able to check all movements of the Habsburg troops. Hundreds of metres of rusty barbed wire are still laid here, in what used to be a no-man's land.
From this post, you can also see the base camp rebuilt by the Association "Friends of the Carnic Alps" and some ruins of barracks along the road toMt. Pal Piccolo, located on the southern side of the mountain to offer protection against possible bombing by the Austro-Hungarians.