What rivers that separates region 1 from 2?

Why was alcatraz chosen to be a national park? What did immigants do on Ellis Island? What are the seasonal changes in lake okeechobee? How much does home roller coasters cost? Is Eurasian plate an oceanic plate or a continental plate? Rivers that start with the letter e? What towns were flooded by the making of Lake Texoma? Why did the gondwana rainforests become on the Australian world heritage list? What will most likely happen to other native mussel species in the great lakes region? How might the use of a scarce resource such as river water by one village affect other communities downstream? In the US what is the second largest city? Are there any major rivers that run through the Andes mountains? What does mean SLOT in aviation? Why is flood plain suited to human habitation compared to mountains? Where is the Oakham Historical Museum Inc in Oakham Massachusetts located? What is the widest country in the world? Is the Pacific Ocean bigger than the Atlantic Ocean? How did the Liberty Bell get its crack? In which direction does the Mississippi river flow and into which body of water does it empty? If there were no harmful fish could you use a exercise ball to walk across the ocean?

What rivers that separates region 1 from 2?