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Oman & Yemen 1:1,400,000 Including inset of U.A.E, Salalah, Central Muscat, Sana'a, Taizz ITM travel map (International Travel Maps)
Oman is a stark and wild mountainous country. This map shows its physical features and road network exceptionally well.
Yemen is one of the most unusual countries in the world, but well worth a visit if you can get in. This map certainly shows the country to good advantage, especially its exotic terrain. Politically, this is a country one would have to define as challenging; touristically, as well. However, as a map, this one is exceptional.