Towards the end of our tubin' adventure, the river actually went partially underneath one of the giant karsts! Check out the view! Right after we came through this underpass, someone was waiting by the edge of the riverbank with a so to take everyone back to the hotel.
The river was so pretty. It ran all the way back into the woods and got really close to some of the karsts that we had seen in the distance from the hostel.
The guy at our hostel highly recommended the tour of the lake and I took his word without asking him to go into too much detail about what we'd be doing on the tour. Around this time we'd be driving across the lake for almost an hour and we were starting to wonder if the whole tour was going to be spent on the boat.