Then in the afternoon I am taking a ride to Suomenlinna, a stronghold located on four island not far from Helsinki. The reason I am going there is because it includes a boat cruise and costs so little, less than 4 Euros. Suomenlinna was built in 1700s. The amount of work that people did without any automation is amazing. They used huge stones to build 10-meter walls at the perimeter of the islands. I guess the total length of their constructions is nearly 1km.