Lots of questions on different subjects where you have to try to answer the latest question and if you are right then its your turn to ask the next question.
The longest is in the state of Alaska and the thickest in Idaho. Texas and Oklahoma have one each that touch each other. Connecticut, Maryland, Florida and Nebraska all have one but West Virginia has two. What?
No, actually the question is misleading in that it should be in the Geography section. You're looking for a word for a geographic feature that is used almost solely in the USA. The best known example is in Florida.