In the central part of Hoy Island is located mysterious monument of the past - Dwarfie Stane - enormous sandstone slab left by glacier. Some 5,000 years ago people with unknown methods and unclear purpose hollowed out this stone, creating a passage with two side chambers. Passage was plugged with a 1.5 tons heavy stone plug - door.
The Ring of Brodgar (alternative spelling Brogar) comprises a massive ceremonial enclosure and stone circle probably dating from between 2500 and 2000 BC. Around it are at least 13 prehistoric burial mounds and a stone setting (2500-1500 BC).( Scotland ) (Kite Photography )