This city and its stories are surrounded by legends and mysteries, which makes it an interesting visit. The most common story is that Ubar was a very rich city that was once famous for its profitable frankincense trade and a huge sandstorm buried the entire city. Ever since, explorers have made it their job to travel to southern Oman, looking for the lost city. The city is hidden deep inside of Al Rub Al Khali desert, and has unique architectural ruins.