The departure point for a journey to Jordan: Amman.
Be careful with the opening hours of the sights that you visit: they often close very early.
Along with its Syrian neighbor, Damascus, Amman is one of the oldest cities in the world. As well as being the capital of Jordan, it is the port of entry or departure for the majority of tourists in the country.
As capital cities go, Amman is pretty pleasant, but I would still prefer staying near the sights, rather than in the city itself. I recommend Jerash for visits to the north, and Madaba for the south.
