If you want to make sure you'll see a geyser erupt, come to see this one – one of the most reliable geysers of them all that erupts every 10 minutes. It is located in the area where many other geysers are to be found but the other ones don't erupt so frequently and so reliably. Come and watch the water sprung up the air as high as 20 m.
Before the trip, consider the weather conditions. Also, since the geyser is so popular, expect quite a few tourists to be here as well. If you want to avoid the crowds of tourists, come early in the morning or around the sunset time.
Wikipedia https://en.wikipedia.org/wiki/Strokkur
Address Iceland
Coordinates 64°18'45.707" N -20°18'2.784" E