Observation towers on the map: over 400 towers in Finland with views over lakes, forests and towns. By municipality, free and without sign-up.
417 places in
The map shows 11 observation towers in Helsinki. This is the number of places in this service, not an official total for the municipality.
5 places have parking within 500 metres (typically 250 m) and 4 places have a bus stop nearby (typically 300 m). Distances are measured to the nearest parking area and bus stop marked on the map.
Linnunlaulu is right in the city centre. The farthest is about 14 km away.
Malminkartanonhuippu, Vuosaarenhuippu. These have their own description, a photo or a Wikipedia article, so the place page offers background beyond the location alone.