Below are the photos' positions shown. At the moment I am working on getting the positions of this tourist map confirmed as correct Finnish-Swedish boundary.
As shown on picture 5 this small headland might be a Swedish pene enclave.
In the northern part it also might be one more Swedish pene enclave on the eastern river bank, and one border penetrated islet.

(Bi-country golf courses are not that rare as one should believe. Now Cambodia, Laos and Thailand are planning a 27-hole tricountry golf course (with 9 holes in each country)  in the new named «Emerald triangle». According to Reuters the proposed site is in Ubon Ratchathanee province's Chong Bok town, 650 km northeast of Bangkok, next to Laos' Champasak province and Cambodia's Prea Vehear mountain. The idea is to to turn a landmine-infested area bordering Laos and Cambodia into golfing paradise.)