This cave is an ancient ruin from the stoneage. Space in the under ground is quite big and contains many antique objects on display.
This site is open for visitors. If you are interested in, you can contact the owner and make an appointment.
Abu Jaber museum is on the half way to Queen Alia International Airport from Amman. There is a nice Arabic restaurant "Kan Zaman" close to this cave.
For more information, please see this leaflet.