Located in Húsafell, Iceland, this triangular-shaped stone was reportedly used as a gate to a sheep pen by a local pastor in 1756. The challenge isn't just to lift it, but to carry it around the approximately 34-meter (112 ft) perimeter of the sheep pen. Achieving this feat, known as "fullsterkur" (full strength), is a monumental test of strength, stamina, and endurance. Its unique shape and the carrying challenge make it particularly difficult and renowned.
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