Osmundwall Cemetery is located on South Walls, a peninsula at the southern end of Hoy. It was used by the Royal Navy in 1914-15, before Lyness (Royal Naval) Cemetery was established in 1915. It contains 41 Commonwealth war graves from World War I and one from World War II.

It is also the final resting place of seven of the eight crew lost in the RNLI Longhope lifeboat disaster in 1969, flanked by a statue erected in their memory.