* Atlantic Ocean: The main body of water to the north of Guyana.
* Essequibo River: The largest river in Guyana, flowing north into the Atlantic.
* Demerara River: Another major river flowing north into the Atlantic.
* Berbice River: Another significant river flowing north into the Atlantic.
* Courantyne River: Forms the border with Suriname to the east.
* Takutu River: Forms part of the border with Brazil to the south.
It is important to note that Guyana also has numerous smaller rivers, lakes, and creeks throughout the country.