The Tranquility Cracks are deep fissures in the rocks on top of the Twelve Apostles mountains near the top of Slangolie Buttress (half way along the Twelve Apostles). The cracks are a labyrinth of natural rock corridors often about 5m deep and sometimes completely enclosed. The Tranquility Cracks make an excellent destination for a hike as they are interesting to explore, in a relatively quiet area and offer stunning views.