Comasine, a village of the municipality of Pejo, is located at about 1,200 m a.s.l. amidst the meadows and woods of the valley. Until 1857, Comasine was the centre of the iron ore mining area in the Peio Valley. This small mountain village is also the birthplace of the family of Giacomo Matteotti, to whom a commemorative plaque is dedicated on the façade of the recently restored "Matteotti - Meneghetti" House near the church in the village of Comasine.

The church dedicated to Saint Matthew is well known for its wooden altars, which partly come from the Santa Lucia Church. Above Comasine, at 2,100 m a.s.l., a forest consisting of 130 larches can be discovered, the oldest of them date back to 1365. A road leading to the settlement of "Forno di Novale" from the village allows you to descend to the valley floor, where iron extraction used to take place.