1. Rio Grande: The Rio Grande is the largest river in Jamaica and forms the boundary between Portland and St. Thomas parishes. It is known for its scenic beauty, including waterfalls and lush rainforests.
2. Black River: The Black River is located in the southwestern part of Jamaica and forms a natural boundary between the parishes of St. Elizabeth and Westmoreland. It is known for its dark-colored water and mangrove swamps.
3. Great River: The Great River is located in the western part of Jamaica and serves as the boundary between the parishes of St. James and Hanover. It is known for its waterfalls and historic significance, as it was an important transportation route for the Taino people.
4. Martha Brae River: The Martha Brae River is located in the northern part of Jamaica and forms the boundary between the parishes of Trelawny and St. Ann. It is famous as a tourist attraction, offering rafting experiences through scenic landscapes.
These are a few examples of rivers that serve as geographic boundaries in Jamaica. Others include the Cobre River, Yallahs River, Morant River, and Plantain Garden River.