Tartu song festival grounds

Tartu song festival grounds is located at the hillside of Tähtvere and Supilinn. Concerts, singing and dancing festivals, sports events and theatre plays. The height of the arc is 28 m and width 54 m and depth 42 m. It has a shape of hyperbolic acoustic screen, which reflects sound only once. The visitors platform and the steps of the performers to the stage form a uniform resembling to a amphitheatre. The platform divides to four sectors, which has altogether 10 000 seats, plus 5000 listeners can sit at the hillside.

(Translated from wikipedia.org)