The Osadné crypt is a crypt of 1 025 soldiers in the World War I in Osadné (the district of Snina). The crypt is built under an altar part of the Orthodox Church of the Lord´s Ascent. It is the largest under-church graveyard in Slovakia. Dimensions of a grave in the cryptare 4 x 1.5 x 7-11 (depth) metres (length x width x depth). Room is decorated by the orthodox icons, it also includes information boards on history of the crypt and interesting facts on the village and surroundings.