The phrase "Three Rivers" is associated with the location of Pittsburgh, Pennsylvania.
The three rivers in Pittsburgh are the Monongahela River, the Allegheny River and the Ohio River.
The phrase "Three Rivers" has obviously been in use since Whites entered the area. But by the 1970s, it became a marketing campaign strategy. From events like The Three Rivers Arts Festival, every imaginable business and endeavor was named Three Rivers ___. Three Rivers Stadium, now torn down, was home to the Pittsburgh Pirates (Baseball) and was one of the most famous places.
The Fertial Cresent and The land between two rivers
Pittsburgh Pennsylvania, located in the southwest area of the Commonwealth of Pennsylvania, can range from the mid 70s F to 90s F in the summer. It's location near three large rivers adds to the humidity known in this region. However, the rivers and Pittsburgh's location in the valley allows for some cooler air in the evenings or by late night.
Mississippi
A 7-mile stretch of the North Canadian River known as The Oklahoma River.
Mesopotamia is known as the land between the rivers.
The Paraná, the Paraguay, and the Uruguay rivers make up the second largest river system in Latin America. This system is known as the Paraná-Paraguay-Uruguay river system and plays a crucial role in the region's economy and ecology.
Fort Pitt as I know it was located at "The Point" in Pittsburgh, PA It is where the Monongahela and Allegheny rivers combine to form the Ohio. Hence three rivers. There is also a well known FDNY firehouse nicknamed "Fort Pitt", derived from this original meaning. The nickname applies due to its location on Pitt Street, in the Lower East Side of Manhattan.
In general, such a point is a WATERSHED. In north America, the continental watershed is known as THE GREAT DIVIDE.
Rivers
The Punjab in India is known as the land of five rivers
It is known as the Continental Divide.
Land of Rivers.