Sofia. The ice rink at Ariana Lake in Bulgaria's capital city Sofia opened on Sunday, FOCUS News Agency announced. The first hour on the skating-ring is free today. Many games, prizes and surprises are awaiting Ariana skating-rink visitors. The capacity of the skating-rink is 350 people. It is located on 1,400 square meters and will operate 24/7 during the winter season. One session on the skating-rink continues for one hour and twenty minutes. The entry fee is BGN 5, and skates hire is BGN 4.