In the former Adamavas manor, on the western bank of the Žeimenėlė valley, grows a powerful tree which is about 600 years old. The diameter of this oak is 2.2 m, height: 26 m. The genetics and environmental conditions have determined the value of this centuries-old oak. It has a large mark left by lightning on the southeast side of the trunk. Adamavas oak is like a relic, reminding us of the past and allowing us to understand the worldview of ancient Lithuanians and the respectful attitude towards nature.