Mustaviiri, geodetic marker in Finland
Mustaviiri is a small island near Pyhtää in Finland and part of a UNESCO World Heritage Site. It has a rocky landscape with a measurement station from the Struve Geodetic Arc, an observation tower, and remains of old structures and stone arrangements.
The island has been visited by people since the 18th century and served as a navigation point. The Grönholm family settled there in 1873 and lived by fishing until the early 20th century, after which it became uninhabited.
Mustaviiri served as a navigation point for fishers and boat travelers in the region for many generations. The stone arrangements and rocky shores show how people used this coastal area to move across the sea and conduct their daily work.
Reaching the island requires your own boat or a hired water taxi since there is no regular ferry service. The island is exposed to open sea and weather conditions affect access, so experience with small boats is important.
The measurement point here is the southernmost station of the Struve Geodetic Arc in Finland, a 19th century project to survey the Earth from the Arctic to the Black Sea. This historic station on bare rock is a rare witness to this scientific effort.
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