The limestone Ohessaare cliffs, on the western shores of the Sõrve peninsula, are around 500 m long and up to 4 m high. They present the most extensive cross-section of young Silurian rock and sedimentary layers in Estonia. The cliffs are famous for the stone towers that people have erected here. Those who visit the site are encouraged to use the flat stones found on the beach to make their own unique contributions to the landscape. The rocks in the area also contain a lot of fossils.