Orjaku Tower is one of the largest birdwatching towers in Estonia. In spring and autumn, thousands of migratory birds can be watched from the tower while they stay in the Käina Bay. Since 1962, Käina Bay has been a protected area and has been a part of wetlands of international importance (Ramsar sites) since 1997.

There is also a 1.5 km nature trail at the birdwatching tower.