Oiapoque

The Oiapoque River (or Oyapock) is a river approximately 403 km long in South America. 

It forms the majority of the border between Brazil (Amapá State) and French Guiana (French overseas department). 

Source: In the Tumuc-Humac Mountains (Tumuk Humak). 

Mouth: In the Atlantic Ocean at Cape Orange, near the cities of Oiapoque (Brazil) and Saint-Georges-de-l'Oyapock (French Guiana). 

Landscape: It flows through dense tropical rainforest (Guianan humid forests) and is sparsely populated. The river is historically significant: discovered around 1500 by Europeans, long disputed between Brazil and France (resolved in 1900). 

Since 2017, there has been a bridge across the river connecting the two countries. 

In Brazil, Oiapoque symbolizes the "beginning of Brazil" (from Oiapoque to Chuí). 

In short: a border river in the northeast of South America, surrounded by jungle.

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