Saaremaa is the largest island in Estonia, measuring 2,673 km², located in the Baltic Sea. Its territory has been inhabited for at least 5000 years. The capital is Kuressaare, also famous for its medieval castle - which was originally built in wood between 1338 and 1380, and is on Unesco tentative list.
Kaali is a small group of nine unique meteorite craters on Saaremaa - the largest one measures 110 meters in diameter and contains a small lake known as Kaali järv. Fable-like!