A very important thing to do in this area is to stay on the paths. I was told a dozen tourists or so every year get severely injured by straying from the paths and/or doing something stupid such as putting their hands in the water. Be aware the water in these vents is extremely hot -- sometimes even greater than 100C -- so don't even think about getting near it. Also, be aware that some vents have very thin crusts on top of them, which means if you stray off of the paths, you could be in for a very hot time, and I'm not talking about the Reykjavik nightlife! Finally, stay outside the ropes -- they're there for a reason. Should a geyser erupt, the splash could leave you with uncomfortably warm memories of your visit.
The geyser fields here are strewn with steaming earth, streams, trickles and pools of water. Some of the water is hot. Some is not, but you really never know what you're going to encounter, so try to resist the temptation to test the water with your finger. Water that is superheated by magma can easily burn our delicate human skin, so why take a chance?
There are ropes surrounding the geysers and they are there for a reason, so don't cross the ropes.
The ways are prepared and signed . D ´ont leave the ways , because you can be stuck in a softly ground . There is no help possible if you are burned
The fumes from a geyser are full of sulfur. The smell of rotting eggs can be overpowering. So, be prepared.