Napabale Lake is connected to the sea via a natural tunnel. At low tide strong swimmers can brave this span of water for an exciting and unusual experience. It is dangerous to attempt this feat during high tide, as the water rises to only one half meters below the roof of the tunnel. Motonunu Lake is known for its clean, clear, darkblue water. Although it is also connected to the sea, it is a frsh water lake. Both lakes are 15 km from Raha, the capital of Muna Regency, on Muna Island. They are accessible by sailboat, from Raha, in only 45 minutes.