I'll try to translate some facts from Polish:
Kulaszne is the most north placed village of Komańcza administrative district. The name probably comes from the Albanian language - kullose - meaning pasture. In the years 1977-1981 the name was polonised for Międzygórze.
The town was located with the Vlach law. From 1538 to 1772 it was one of the villages in Russian province. After the first Poland partition Kulaszne belonged to the Lesko region and later Sanok.
In 1785 the village was inhabited by 235 people.
After World War I, like most of the surrounding settlements, in which lived many Lemkos and Ukrainians, Kulaszne opted for inclusion to the Komancza Republic. During the the Second Polish Republic, the village served as the town of Spa. In the village were several guest houses and a Mineral Water Pump Room. In 1947, Kulaszne residents were displaced to the West and North-East of Poland. In the early 60s, however, many have returned to their small homeland.
A few years ago in Kulaszne was built Greek Catholic Church of St. Michael the Archangel. The newly established temple is situated near the place where was the original orthodox church of Michael the Archangel, built in the early twentieth century, and burned down in 1974 and a Roman Catholic church was built over the foundation. There is a cemetery where was buried a painter, sculptor and lover of Bieszczady mountains - the legendary Andrzej "Połonina" Wasilewski.