Geysir Hot Springs in Iceland 

Gaysir is located in Haukadalur valley, a geothermal area of more than 50 hot springs and multicolored mudpots in southwest Iceland
There are two geysers, which are called Geysir and Strokkur.
Litli Geysir
There are about thirty much smaller geysers and hot pools in the area. The first named pool on the path is Litli Geysir ('Little Geysir'). The thick, boiling fluids with the sulfurous smell looks like an abandoned witches' cauldron. It doesn't spout like its bigger namesake, but just keeps a constant bubble.
Like many of the other pools, the little geyser does not have the buildup of steam that creates the spectacular eruptions in the active geysers naturally tied into earthquake activity in the area.
Strokker, the Churn
Strokkur geyser at Geysir Hot Springs Geothermal Area in IcelandThis one is still very active. It may be smaller than the 70 to 80 meter high plume of steam that Great Geysir produces, but the 25 to 35 meters high eruption of steam is an amazing sight
See video 'How Geysers works' • Geysers, How do they work