Grotta Gigante / Briškovska jama in Sgonico / Zgonik

You're standing at the entrance to the Grotta Gigante, the Giant Cave, up on the Karst plateau above Trieste. In Slovene it's called Briška jama, after the little village of Briščiki nearby. From out here there isn't much to see, but right beneath your feet lies an enormous hollow. Picture a hall a hundred and seven metres high, a hundred and thirty metres long and sixty-five metres wide. You could fit a decent-sized church in there, steeple and all.