Here is a fun US geography trivia question I came up with while looking at a wall map...
How many rivers in the United States can you name that are used for time zone boundaries?
i.e., the time zone is different on each bank for a length. So you can have an example I will give you one, the Colorado river is the boy dart between Mountain and Pacific along the ArizonazCalifornoa border (and Nevada-Arizona as well). We will count that even though certain parts of the year Arizona is the same time as California, caused by Arizona not using Daylight Savings Time.
I found 10 on a quick glance search. We are not gonna count Lake Michigan as part of the St. Lawrence Seaway.
