The last big volcanic activity at Nisyros occurred over 20,000 years ago, but the interior caldera has an active hydrothermal system with continuous rise of hot water and gas from fumaroles. The last violent eruptions occurred in 1873 and 1888.

That said, it’s a fascinating but smelly place – you can smell the sulphur fumes from far off. For that reason we arrived around 5pm when it was slightly cooler and we virtually had the place to ourselves. Unlike UK obsession with safety, this place was the complete opposite. We were told to avoid soft ground and not to touch anything around the fumaroles; the last accident was yesterday. Pretty obvious to some, since the gas comes out with superheated steam. Sometimes there are mud pools at 100 degreesC although not today. Great experience to see it, but not the place to hang around.

Difficult to capture in a picture, the vids below show some of the fumaroles with gas emissions, audibly quite strong.

https://haupt.uk/wp-content/uploads/2019/06/img_0709.movhttps://haupt.uk/wp-content/uploads/2019/06/img_0707.mov