Geysir was perhaps one of the most astonishing natural wonders I have ever encountered in my travels. I remember that as we parked our vehicle and walked towards it, I was shocked stiff at how high the water blew out from under the ground and into the air. The super-heated column was visible even 500 metres away where I was!
There is only one Icelandic word that is used in English and that's "geysir." All geysers around the world have been named after this grandfather of geysers. Geysir shoots up regularly once every 15-20 minutes. For photo enthusiasts, do not despair. It is EASY to guess when it's ready to shoot. About 15 seconds before eruption, there would be a huge bluish-green boiling bubble that emerges from the ground. Get the focus ready, your finger at the button, get your partner into the picture - whatever. Do them all within 15 seconds and you will have yourself a great picture!
Across the road next to the parking lot, there is a restaurant as well as a fast food chain that serves very good hamburgers and #1 fries. Behind there is also a museum on geysers as well as a huge souvenir shop.