Near the Molėtai Observatory, on the picturesque bank of the lake Lenktinis, there are remains of the buildings of an old ethnographic homestead - a cellar, a barn, and a sauna. This homestead, like the entire southern shore of Lake Lenktinis, belongs to the Museum of Molėtai Region. In 1996, an ancient celestial observatory - a holy place - was installed near the homestead. A stone Sun-fire altar is placed in the middle of a circle of ten wooden temple pillars with calendar signs. The pillars mark the six countries of the world and the azimuths of the Sun's course and direction on the days of the most important calendar holidays. When you visit here, you can get the impression of how the celestial lights were observed and calendar time calculations were performed in ancient times.