Relaxing in the woods and find a strange phenomenon

Hello guys, this is my first attempt to make a Vlog. I was in a forest, I was going there because the weather was very hot in my town so i decide to go there and relax a little. At the end of the video you will see a very strange phenomenon, somehow in that place from the earth come to surface some bubbles, i dont know for sure what is that because the water is not hot, it is very cold, it is not smell so maybe is gas or i dont know for shure. I try to search on google what can be that but not find something similar with that. If you know what can be that tell me in the comments please. The video was shot with Samsung S7 EDGE in Baia Mare, Romania on Petofi Sandor street.