Thanks for this page, Paulo!!
Ahhh it's nothing!
When i was there i really enjoyed the place. It was cold (around 0°C, -2°C) and i was wearing only a small t-shirt, but i took that pictures anyway. And surprisingly they came out good because my camera at the time was really awful: olympus D435 - :(
I love volcanoes and hot springs areas! In fact, i just published an article about volcanoes on our brazilian website (link on my profile)