Byeolmaro is a public astronomical observatory built on the peak of Bongnaesan Mountain (alt. 799.8 m) in Yeongwol. The term ‘Byeolmaro’ combines the words byeol (star), ma (peak) and ro (peaceful). Together, they collectively represent the wish to view stars in a clean and peaceful environment. The observatory has a variety of telescopes, including one with a diameter of 80 centimeters.