Koivusaari is an urban classic with a stunning sea view. The sode facing the sea has overhanging routes with powerful moves and the vertical side is much taller with technical routes and spicy top outs. Koivusaari dries very early and it's common to see climbers there year round.
Koivusaari offers many routes and variations. Some argue too many. Many more have been climbed and new ones are rsuggested on the regular. This topo provides the obvious lines and some popular variations. Some complicated and unintuitive routes have been dropped from topo and moved into a graveyard for variations.