Harilaid is a peninsula with an elongated shape and an undulated shoreline in the northern part of the national park. A few centuries ago, Harilaid was still an island, but now it is connected with the Tagamõisa Peninsula. Most of Harilaid is covered with pine forest and a lake, named the Laialepa Bay that formed from an old gulf. As a result of the erosive-piling effect of the sea, the shoreline of Harilaid changes constantly, especially on the tip of the Kiipsaare cliff. Kiipsaare lighthouse was built in 1933 in the centre of the peninsula.