Hi Aurélie,
Is the Thakhek loop for heading to the Kong Lor cave?
The landscapes are stunning!
We got off the bus from Vientiane at the intersection of the main road to the cave
(the village is called Vieng Kham, the bus driver knows it), then took a tuk-tuk to the next intersection, the village of Na Hin where we stayed for 2 nights. There were several guesthouses (back in 2017).
There’s a lovely walk to the Nasanam waterfalls.
To get to Kong Lor, there’s a shared bus (actually 2, since at one point there was a bridge that could only be crossed by smaller vehicles). We stayed another 2 nights there.
Then, you have to head back... to Thakhek, it takes at least a full day.
In Laos, getting around takes time :)