Chuí Stream, Border river between Rio Grande do Sul, Brazil and Rocha Department, Uruguay
Chuí Stream is a border river between Rio Grande do Sul in Brazil and Rocha Department in Uruguay. It flows from inland swamps through sandy coastal plains and into the Atlantic Ocean, forming the natural boundary between both nations.
The stream was established as the border line between Brazil and Uruguay during the 19th century when both nations defined their territorial limits. This boundary has remained consistent through decades and continues to mark the separation between the two countries.
The phrase 'from Oiapoque to Chuí' is used to describe Brazil's full territorial span, representing the country's vastness in everyday speech much like 'coast to coast' elsewhere.
The stream is accessible from both countries via paved roads, with viewing points in the coastal villages of Barra do Chuí and Barra del Chuy. The driest season offers the easiest access and best views of the waterway and surrounding landscape.
This location marks the southernmost point of Brazil and also the start of Cassino Beach, which stretches for many kilometers along the coast. The beach here forms an extended sandy shoreline that attracts visitors looking for wide-open coastal landscapes.
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