This surprised me in Oman
Had some free hours before heading to the airport for a late night flight. Got a cab and started towards Wadi Shab. (Wadi means a river, I think). On the road, we went thru 100km of mountains. Never saw the end of it. I did not realize that Oman had so much of mountainous zones.
Errata: Thanks to Rupa, I now know that Wadi means a valley.