The article is devoted to the ethnological and the religious culture history research results on the cult of the Hills of Crosses in Lithuania and Poland. It is typical to have still preserved the cult of the Hill of Crosses both in Lithuania and Poland. The Hill of Crosses in Lithuania is not far from the Šiauliai city, while in Poland – it is in Grabarka localities. The research allows us to make the conclusions about the identities (geographical situation, the origin of the cult, the heritage of the religious culture, and rituals), peculiarities (Catholic and Orthodox sanctuaries) and rituals here. The hypothesis was raised that the cult of the Hill of the Crosses in Lithuania and in Poland is a Christian symbol of the fights for religion and freedom.