Smoo Cave (located near the village of Durness on the north coast of Scotland) on is one of the most visited tourist attractions in Scotland, however don’t let this put you off. The natural sea caves carved into limestone cliffs allow plenty of room for private exploration and for personal guided tours. The inside of the caves is an awesome spectacle with numerous chambers which one can take a boat into if desired. Thundering waterfalls inside the cave provide regular cascades of water and at times the caves are shrouded in fog and mist (a wonderful yet eerie experience).