This is a simple, wide open mesh cave that comes with materials enabled (requires Advanced Lighting Model). This mesh cave is compatible with the #FYICaveSystem so you can use it as part of a large builder's kit, where you pick and choose the parts, to build your own unique cave systems. If you're not up for a builder's kit, you can use this mesh cave with the included mesh mountain and rez it out on land.
The interior cave area is about 28m x 28m and 27 land impact at the default size. The mountain is roughly 55x58x42 and 130 land impact. Together they are 156 land impact when linked.
Both included very accurate physics.