I’ve always been disappointed that Geysir in Iceland has never erupted when I’ve been there. As its name suggests, it was regularly throwing water as high as 80m in the early 20th Century, but then went into decline. For a while, the Icelandic government authorised it to be ‘soaped’ on Independence Day to trigger an eruption, but it grew even less reliable and turned into a large simmering pool. There was a resumption of activity in and around 2000 after some nearby seismic activity, but that was short-lived.
The nearby Strokkur is still fantastically reliable and worth a trip - stay on the paths, stay upwind and everything is cool.
