I don’t know where I can write about it, but haven’t found a better place on the forum.
I was curious where geysers are located in the world, so I made an overpass turbo query.
http://overpass-turbo.eu/s/PfA (540 geysers)
Wikipedia says geysers are common mainly on Iceland, USA, Kamchatka, meanwhile on OSM we have them mostly on deserts, Middle East and Europe. I’m not good at hydrogeology but something’s not right here.
Alaska - none
Kamchatka - none
Iceland - only one
Looks like we have a lot of fake geysers on OSM, see for example: http://www.openstreetmap.org/node/6200232286