Sahanlahti is an old sawmill whose yard area used to be intersected by the main thoroughfare from Puumala. There are lots of individual and groups of erratic boulders in the yard – and boulder caves have also formed inside the piles. Throughout history the caves have acted as playgrounds for the children of the village, which is evident from the half-metre tall wall built in one cave. Nowadays Sahanlahti is home to a wide range of accommodation, tourist and harbour services. There are also Saimaa Geopark signs in the area.

Nearby Tupavuori is also one of the Saimaa Geopark sites. The granitized biotite-hornblende gneiss bedrock features a large boulder and crevice cave, whose hall-like space can be accessed through a crack. The cave was formed when horizontal and vertical crevices deepened as the continental ice plucked boulders from the rock. The cave is dark in places, so it is highly recommended that visitors bring a torch. The cave is also said to have been a hideout during the war.  One story has it that some of the troops that passed by the lake heard a child crying in the cave, but since the commander didn’t hear it, he ordered his troops to push on. The people hiding in the cave got off with a fright.

The marked path to the cave starts from Tupavuorentie road. The parking space for cars is a short distance away on the same road. The trail traverses forest terrain and there are climbs and descents along the way, so be sure to wear sturdy footwear and dress according to the weather.

Saimaa Geopark sign at the Sahanlahti parking area (pdf)

Saimaa Geopark sign at the Sahanlahti harbour (pdf)

Saimaa Geopark sign about the Tupavuori cave (pdf)

You can also find more information about the Sahanlahti and the Tupavuori cave here

Watch the Sahanlahti video on Saimaa Geopark’s YouTube channel


Coordinates: x=560886,539 y=6827329,009 (ETRS-TM35FIN)

The above coordinates are working in GPS-devices and for example in service.

The below coordinates are working in Google maps service, which uses geographic coordinates:

Coordinates: 61,574614241, 28,146549557 (ETRS89 maantieteelliset(~WGS84))


Image: Kaisa-Maria Remes


  • Suitable for children
  • Parking
  • Boating