Fårö is a small Baltic Sea island north of the island of Gotland, off mainland Sweden's southeastern coast. It is the second-largest island in the province. It has a population of fewer than 600 and has become a popular summer resort. The island has no banks, post offices, medical services or police. It has its own dialect (a dialect of Modern Gutnish), claimed to be the "oldest" language in Sweden.
A stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, isolated by erosion. Stacks are formed through processes of coastal geomorphology, which are entirely natural. Time, wind, and water are the only factors involved in the formation of a stack. They are formed when part of a headland is eroded by hydraulic action, which is the force of the sea or water crashing against the rock. The force of the water weakens cracks in the headland, causing them to later collapse, forming free-standing stacks and even a small island. Without the constant presence of water, stacks also form when a natural arch collapses under gravity, due to sub-aerial processes like wind erosion. Stacks can provide important nesting locations for seabirds, and many are popular for rock climbing.