Konevets Island (Finnish: Konevitsa or Kononsaari) has the maximum length of 5 km; its average width is 2 km. The island is separated from the mainland by a 5-km-wide strait. In the Middle Ages, the island was considered holy by the Finnish tribes who particularly revered a huge boulder in the shape of a horse's skull, weighing more than 750 tons. This boulder is known as Kon'-Kamen' (literally, "Steed-Stone") and gives its name to the island.