Located on the Isle of Skye, Spar Cave is only accessible for an hour on either side of low tide, but for those prepared to brave the wet and brief clamber over the rocks, hides a beautiful cavern and a place steeped in local legend and literary history. Reaching the cave is no easy task. Visitors must traverse a canyon that drives some 200 feet inland, where walls of rock rise at least 100 feet tall on either side. The moss-covered remains of an old wall stand over the entrance to…