There is no river known as the 'Scotia River'.
Istanbul is the Turkish city that is the only one in the world located on two continents, Europe and Asia. The Bosphorus Strait runs through the city, separating the two continents.
Amazon river (South America) River Nile (Africa)
Europe and Asia are the two continents that are located on a single land mass. This means that there isn't a large body of water separating the 2 continents.
There were fewer continents in the past due to tectonic activity forming and separating landmasses. It is believed that there were only one or two supercontinents in the distant past, which eventually broke apart into the continents we have today.
When two continents split, a divergent boundary is formed. This boundary creates a gap between the separating continents, which can eventually become an ocean basin as new crust forms and fills the space created by the separation.
A watershed is the area separating two different drainage basins/river systems.
The Ural Mountains are considered a cultural boundary between Europe and Asia. They stretch from the Arctic Ocean to the Ural River in Russia, separating the two continents both geographically and culturally.
The Mississippi River borders Iowa on the eastern side, separating it from Illinois and Wisconsin. The Missouri River borders Iowa on the western side, separating it from Nebraska and South Dakota.
The continents that meet at the Isthmus of Suez are Africa and Asia, separating the Mediterranean Sea and the Red Sea.
The four large bodies of water separating the continents are the Atlantic Ocean, Pacific Ocean, Indian Ocean, and Arctic Ocean. Each ocean separates various continents on Earth.
Drive? You do know there is an ocean (the Atlantic) separating the two cities/countries/continents right?