The Gadarene Swine slaughter took place in the countryside around Gadara. This was one of the semi-autonomous Ten Cities (the Decapolis), in the Roman-controlled area mostly east of the River Jordan. Gadara was almost certainly at the place now called Umm Qais.
In the panorama we have Umm Qais in the foreground, the Sea of Galilee in the background, and the Golan Heights on the right. The gospels say that the pigs rushed over the cliff into the sea and were killed. It is not possible today to find a location on the east of the Sea of Galilee where such a fall is possible – there is a margin of flat land between the Sea and the Golan Heights, and the heights of Umm Qais are even further away.
One possibility is that the lake level may have been higher. But more likely the lake that the pigs fell into wasn’t the Sea of Galilee, but some other lake in the area.
The southern end of the Golan Heights is near vertical in places – you can see the road switchbacking down in the photo. Driving down it you will pass wrecked vehicles suspended halfway in the vertical ravines beside you. And at the bottom is a small lake.
So I suggest that the south end of the Golan Heights is the place where a herd of 2,000 pigs were kept for the Legio X Fretensis, and that Jesus and his followers chased them over the cliffs that are just to the left of that zigzag road in the picture. There may be other equally steep cliffs on the ridge of Umm Qais itself – but maybe you don’t want to have that many pigs on your doorstep. They’d be perfectly safe just across the valley, wouldn’t they? Unless some Jew came along with a chip on his shoulder about pigs and Romans…