Orjaku study trail runs mainly on the shore of the Gulf of Käina. The avifauna of the Gulf of Käina, which consists of 192 species, is interesting and biodiverse. In the autumn, 10–15 thousand water and coastal birds stop on the Gulf.
The trail consists of a longer, Orjaku (2 km), and a shorter, Roostiku, trail (0.7 km). The trail also has a birdwatching tower, three observation platforms, a mud bridge, a recreation site with a shelter, and a boardwalk of approximately 0.4 km in the reed field.

The study trail is perfect for families with children – the shorter trail is manageable even for the very young. Watching the water birds from the observation platform is an interesting experience for both the young and the old.

The trail is marked with arrows and can be completed without getting one’s feet wet.