Oman’s highest mountain, Jebel Shams (Mountain of the Sun; 3075m), is best known not for its peak but for the view into the spectacularly deep Wadi Ghul lying alongside it. The straight-sided Wadi Ghul is known locally as the Grand Canyon of Arabia as it fissures abruptly between the flat canyon rims, exposing vertical cliffs of 1000m and more.
The first Pony Express set out, carrying mail from 'St Jo' 2000 miles west to California, in 1860. The service, making the trip in as little as eight days, lasted just 18 months before telegraph lines made it redundant. The Pony Express National Museum tells the story of the Express and its riders, who were mostly orphans due to the dangers.