Not sure about when to use prepositions of place: in, at, on ?
This grammar mind map speaks for itself. We do not have to explain anything here – all you have to do is watch some of the examples and try to memorize as much as you can! Make some coffee, play your favorite music and relax! You will remember the rules in no time at all!
Most of the examples are taken from: English Grammar in Use, Third Edition, Intermediate, Raymond Murphy, Cambridge University Press (2007)