Horseshoe Falls
International border
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Niagara-boundary-1819.jpg/220px-Niagara-boundary-1819.jpg)
When the boundary line between the United States and Canada was determined in 1819, based on the Treaty of Ghent, the northeastern end of the Horseshoe Falls was in New York, United States, flowing around the Terrapin Rocks, which were once connected to Goat Island by a series of bridges. In 1955, the area between the rocks and Goat Island was filled in, creating Terrapin Point. In the early 1980s the United States Army Corps of Engineers filled in more land and built diversion dams and retaining walls to force the water away from Terrapin Point. Altogether, 400 ft (120 m) of the Horseshoe Falls was eliminated. Due to erosion, the Falls will continue to move in relation to the boundary line in the future, possibly altering territorial boundaries between the two countries.
The official national maps for both Canada and the United States indicate that a smaller portion of the Horseshoe Falls currently is located within the United States.
Gallery
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Horseshoe Falls at night
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Horseshoe Falls, viewed from Table Rock Centre in Niagara Falls, Ontario
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View from beside and behind Horseshoe Falls
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Horseshoe Falls, viewed from the Maid of the Mist tour boat
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A view of Horseshoe Falls with the Canadian flag at night