This place is just a few metres to the west of Xwejni Bay and you can start diving right in this bay. Personally, however, I recommend to start our trip at a place called The Washing Mashine. The area is strewn with brines, often still operating, so please pay special attention to avoid them on the way to the Washing Mashine.
Double Arch, which is a double rock arch located at a depth of between 16 and 35 metres, is about 150 metres from the shore to the north of the entry point. Reaching it should not be a problem to anyone with a compass. I recommend you to swim on the surface at first, exactly to the north, and then submerge about 10-15 metres after passing the tracts of posidonia grass.
After submerging, we head north to the edge of the reef, then begin a deeper dive to about 25 metres and go around the rock whose summit is at the depth of 16 metres and forms the upper edge of the higher arch. The bottom here is at the depth of 40 metres, so we need to control our depth limits. The lower arch is at about 35 metres, the upper arch starts more or less at the depth of 10 metres. After swimming around the Double Arch, we return to the shore, and I recommend choosing Xwejni Bay as our exit point due to the very mild bottom of the exit.
Summary: very interesting dive, between the rocks I recommend watching for large barracudas that quite often swim in this place. Sometimes, there is a quite strong current here, so please take this into consideration when planning diving and get a compass, as a fairly uniform grassy bottom without any specific reference points may cause our confusion. During the entry into the water, we have to ensure not to trample on the brines.