Quoyness Chambered Cairn on the island of Sanday, Orkney, Scotland is a 5000 years old neolithic tomb. That means it's older than the Great Pyramid of Giza in Egypt. Quoyness was excavated in 1867 and re-excavated in 1951. The cairn is about 4 metres (13 ft) high and can be accessed by crawling through the entrance passage, itself 9 metres (30 ft) long.