How you locate where the international border runs between two islands

What’s with these pyramids? They’re even found in folks’ yards.

Pyramids like this sit in prominent spots along the shore. They can seem mystifying enough, even before you see a second one nearby.

At last, I learned the two can be lined up to create an imaginary line running out across the water. The border between the United States and Canada falls where the line crosses a similar line running from islands on the other side. That spot can then be connected to others, at least by some kind of maritime surveyors. It’s another example of connect-the-dots.

The four-sided pyramids are called range markers. They’re a special kind of daymark or day beacon, too.


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