Nawamis
Nawamis (singular: namus) are circular prehistoric megalithic stone tombs located in the Sinai Peninsula in Egypt. Sites called nawamis are also found in Oman and Yemen. Human remains found in the tombs date from 4000–3150 BCE, the Chalcolithic era of prehistoric Egypt and the Levant.
Nawamis are constructed from sandstone, about 2–2.5 m (6.6–8.2 ft) high and 3–6 m (9.8–19.7 ft) in diameter, and have openings facing west.
Some authorities believe the stone structures are younger than the remains.