Truly, if I had to choose one favorite city, I would pick Helsinki. I happily had the chance to live one full summer there, sharing an apartment with a Finnish friend and studying Finnish at Helsinki Summer University. This was my first proper experience in Helsinki, since the first time I chose to visit Helsinki, it was empty.
In 2006, my family landed at the Helsinki-Vantaa Airport, spending one night in the capital before taking the train to Seinäjoki the following morning. We arrived in Finland on midsummer, Juhannus, which is an important holiday. People leave the city and flock to their summer cabins. No joke, the streets were basically empty.
However, now I have ample experience both living in and short-term visiting Helsinki to advise you on what to do in this wonderful city that is not usually so empty!