Questions & Answers about Á safninu er mikill fjöldi ferðamanna um sumarið.
Both á and í can translate as in / at / on in English, but they’re used differently in Icelandic.
- á safninu here means at the museum (as a location where something happens).
- í safninu would more strongly suggest inside the museum (physically inside the building).
With many public places and institutions (e.g. museums, offices, schools), Icelandic often uses á when English would say at:
- á safninu – at the museum
- á spítalanum – at the hospital
- á skrifstofunni – at the office
So á here gives the natural, idiomatic way to say at the museum as a location where there are many tourists.