So far I have only visited several site on the arc in Scandinavia, although like Ian I fear there may be more in the future.
I reached the Alatornio Church by travelling from Kemi station by bus to Tornio, a town located on an island in the Tornio River. The church with its distinctive clock tower is on another island further south and facing the Swedish town of Haparanda on the opposite bank. The short way to the church is by crossing a footbridge back to the Finnish shore, going south, then crossing the railway bridge linking Sweden and Finland, with its dual gauge tracks. This brought me to the cemetery at the back of the church.
On the bus journey through Lapland from Rovaniemi to Alta I stopped in Enontekio and Kautokino, but didn't locate the Struve markers in either place or in Alta.
But I did visit the Struve obelisk on the Fuglenaes Peninsular near Hammerfest. Although it is in a fairly industrial part of town my only companions were a herd of reindeer grazing on the newly planted lawn. Hammerfest, on an island connected by bridge and tunnel to the Norwegian mainland, is the end of the line for a bus service from Alta. I was amazed to find here at latitude 70 deg N that there is a city, factories, grass and animals. I had previously been at latitude 70 deg S (Antarctic Peninsular) where there are only rocks, ice and penguins.