Can we accept "houmous" as well as "hummus" please?
Jerash is one of the best-preserved Roman cities I've ever seen. Umm Qais up north is nice, too. Both are *way* cheaper than visiting Petra, and in my opinion Jerash is better.
Wadi Rum does indeed look surreal and extraterrestrial. Very similar to the landscape in Northeast Saudi Arabia.
The Dead Sea can be visited from both the Jordanian and Israeli sides. The Jordanian side is cheaper and less crowded. The Israeli side is nicer.
Aqaba is beautiful, too.