National parks and hiking areas of Finland on one map: trails, wilderness huts, lean-tos and visitor centres, by municipality. Free to use, no account.
366 places in
The map shows 5 national parks & hiking areas in Lappeenranta. This is the number of places in this service, not an official total for the municipality.
Karhusaari is 2 km from the centre. The farthest is about 25 km away.
Muukonsaaren retkikeskus, Satamosaari. These have their own description, a photo or a Wikipedia article, so the place page offers background beyond the location alone.
On the place's own page. 4 places in Lappeenranta have a link to their own website. The most up-to-date information is always on the place's own site.