Rub al-Khali

            Rub al-Khali ( الربع الخالي) is the largest sand desert in the world, encompassing most of the southern third of the Arabian Peninsula, including most of Saudi Arabia and areas of Oman, the United Arab Emirates, and Yemen. The desert covers some 650,000 square kilometres (250,000 sq mi). 
             The region is classified as "hyper-arid", with typical annual rainfall of less than 30 millimetres (1.2 in). Daily maximum temperatures average at 47 °C (117 °F) and can reach as high as 56 °C (133 °F).  Along the middle length of the desert there are a number of raised, hardened areas of calcium carbonate, gypsum, marl, or clay that were once the site of shallow lakes.
              Fauna includes arachnids (e.g. scorpions) and rodents, while plants live throughout the Empty Quarter. As an ecoregion, the Rub' al Khali falls within the Arabian Desert and East Saharo-Arabian xeric shrublands.

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Jabal an Nabi Shu'ayb

              Jabal an Nabi Shu'ayb (جبل النبي شعيب‎ mountain of the prophet Shu'ayb) is the highest mountain in Yemen (اليمن) in Sana'a Governorate. Also it is the highest mountain in the Arabian Peninsula. The height of the mountain is 3,666 metres (12,028 ft) and is located near the Yemeni capital of Sana'a. 
              Although the summit is not snow-capped like its counterparts in northern Lebanon and Syria, there have been reports of snow on the peak and frost in the winter is there daily. Wind speeds are very high at the summit. This side of the mountain halts clouds burdened with precipitation, causing that side to be relatively fertile.
             Yemen's second highest peak, Jabal Tiyal, is nearly equidistant from the capital as Jabal an-Nabi Shu'ayb is.

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Sana'a

          Sana'a (صنعاء) is the capital of Yemen. Sana'a is one of the oldest continuously inhabited cities in the world. At an altitude of 2,300 metres (7,500 ft), it is also one of the highest capital cities in the world. Sana'a is one of the oldest populated places in the world. Sana'a has a population of approximately 1,748,000 (2010) making it Yemen's largest city. The old city of Sana'a, a UNESCO World Heritage Site, has a distinctive visual character due its unique architectural characteristics, most notably expressed in its multi-story buildings decorated with geometric patterns.
         The main landmark is the old city of Sana'a with Bab Al-Yemen (the Gate of Yemen), Suq al-Milh (Salt Market), Tahrir Square, museums and mosques (Al Saleh Mosque - جامع الرئيس الصالح, Al Khair Mosque, Great Mosque of Sana'a.

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