
This was the backup cave after the failed trip (alt. link) to find the first one. But what a cave! Sometimes it is a raging tube shooting water at 50 m3 per second out to a waterfall and then free falling tens of meters to the lake. And sometimes it is a dry cave that you can explore. Very interesting! Just make sure you choose the latter time when you go caving :-)
This is an extremely easily accessible cave, it is just by the highway, there's a parking area for the people wanting to view the waterfall and the lake, and then there's concrete steps down to the riverbed from the viewpoint platform so that you can access the cave. Very nicely done. However, I suppose one should be careful to not enter when it is raining or there's a danger of a flood coming out of the cave. Being there at that time would be a disaster, with water shooting out and taking you down the waterfall and the rocks underneath. Not good. Avoid at any cost!

(Photo by Natasa Ravbar from "Recent advances in karst research: From theory to fieldwork and applications", M. Parise, F. Gabrovsek, G. Kaufmann N. Ravbar, Geological Society London Special Publications 466(1):SP466.26, May 2018.)
The cave is 400 meters long, according to Review of the Most Significant Caves in Montenegro by by Mirela Djurović and Predrag Djurović, ACTA Carsologica 50/1, 49-65, 2021. And indeed it is on that list, it really is a significant cave. I explored maybe just hundred meters, however, as I was alone and at that point the cave dipped steeply into a giant hall. The floor was smooth rock, slippery and a bit muddy. I was afraid I'd slip and fall down to the bottom and be unable to get back up :-)
Reportedly there's a lake further in the cave. Would have been very nice to see that!
I did manage to do a 3D scan for the part of the cave that I visited though. The model can be downloaded here, rotated on your screen here, and the generated high-resolution PDF map with vertical cross sections can be looked at here.
The coordinates for the cave are N 42.513616 E 18.681420.
There's also a side cave at N 42.513714 E 18.681695.
There's an easy parking lot on the other side of the road. Well worth the stop, even just for the bridge, lake views, possible waterfall if it has been raining, and, of course, for the cave.
For more information about the cave, read from here. here, and here.
I also managed to visit another cave in Montenegro, reported here.
The entrance from inside and the bridge that you don't want to slide under:
3D model and a map:
Other photos:
Here's the small side cave, with stairs leading to it (!). It seemed to have been used mostly as a toilet...
Kotor fort, few kilometers south of the cave is an interesting sight: