Pike's Gut (Hauensuoli)

Pike's Gut — Hauensuoli in Finnish, "Pike's intestine" for its narrow winding shape — is a granite cleft between two small islands a few kilometres off Hanko's southern shore. For centuries it was a natural harbour where ships could anchor in any wind direction; the polished granite walls are covered in inscriptions left by waiting sailors, including the coats of arms of Hanseatic League merchants and Swedish naval officers.

Visiting requires a boat. Several Hanko operators run summer tours; a typical trip combines Pike's Gut with the lighthouse on Russarö and lasts about three hours. The cleft itself is short — perhaps 100 metres — but the density of carvings is genuinely remarkable. Bring a torch to see the inscriptions deeper in the shadows.

things to do sight
A story
More than 600 etched and chiselled marks cover the granite walls of this narrow strait — sailors' graffiti from the fifteenth through eighteenth centuries, recording names, coats of arms, ships, and dates. Hauensuoli was a natural shelter where ships waited out bad weather, and bored crews carved into the rock to pass the time. The result is one of the largest collections of historical maritime graffiti in northern Europe.