22 The Ngorongoro crater country : Tanzania place : north of the country, south of the Serengeti park 21 The precolombian pyramids of Teotihuacan country : Mexico place : north-east of Mexico City 20 Fjords and the Preikestolen cliff country : Norway place : west of the country 19 Sand dunes of the great Sahara place : north of Africa 18 Pagan, the thousand pagodas plain country : Myanmar place : south-west of Mandalay, at the edge of the Irrawaddy river يتبع........