If you look at a map of the United States, you might find yourself wondering what people were thinking when they were creating the shapes of some of the states. Here, there are straight lines; there, it’s all squiggly; and elsewhere, you’re not sure how to describe what you see.

Sometimes, how a state’s shape came to be makes perfect sense, and sometimes, there’s a more interesting story involved. Following are some interesting facts about the shapes and boundaries of some of our states.

1. Curving Boundaries

If you look at the 13 original states and many other Eastern and Midwestern states, you’ll see that they mostly have irregular shapes. That’s because the earlier states tended to be drawn along natural boundaries like rivers and ridges.

2. Straight Lines

As America expanded westward, the federal government drew most state boundaries along lines of latitude and longitude. That’s why, with some exceptions, Western and some Midwestern states tend to look more rectangular and are roughly the same size.

Fun Fact: Colorado and Wyoming are two states that are almost perfect rectangles.

3. Railroads

During the period of railroad expansion, rail lines also played a role in boundary drawing. They often defined where one state ended and another began.

Did You Know? The boundary between Nevada and California was influenced by the route of the First Transcontinental Railroad.

4. The Erie Canal

In a similar way, the construction of the Erie Canal had an influence on the shapes of states. That was over a much smaller area, of course.

Fun Fact: The Erie Canal, completed in 1825, connected the Great Lakes to the Atlantic Ocean, boosting New York’s economy and influence.

5. The Oklahoma Panhandle

This is the sliver between Colorado and Texas. Why isn’t it part of one of those two? There’s a joke that Colorado asked not to share a border with Texas, but the reality has to do with slavery.

Texas wanted to join the union as a slave state, and at the time, federal law prohibited slavery above 36 degrees, 30 minutes north latitude. That happened to be the southern edge of what today is the Oklahoma Panhandle. Rather than not being able to join, Texas ceded its territory above that line.

Fun Fact: The Oklahoma Panhandle is 34 miles wide and 166 miles long, making it one of the most recognizable panhandles in the U.S.

6. The Northwest Angle, MN

You might need a magnifying glass to see this, but on maps, a tiny bit of Minnesota juts north into Canada. Most of it is water, and without a boat, you actually have to drive into Canada to reach the “mainland.” What were they thinking? They really weren’t; it resulted from a survey error and should have been Canadian land.

7. Four Corners

This famous point is where Arizona, New Mexico, Colorado, and Utah all touch at a single point. There’s a marker there, and you can witness people contorting themselves into funny positions to get a part of their body touching all four states at once.

Even funnier: the real four corners is a few hundred yards away. Once again, a surveying error was responsible.

8. Point Roberts, WA

No accident was to blame for this one. When the U.S. and Canada were working out boundaries, they agreed to make this peninsula that’s actually attached to British Columbia part of Washington. Traveling there by car from the U.S. is only possible by driving through Canada.

Fun Fact: Residents of Point Roberts have to pass through two international border crossings if they wish to travel to the rest of Washington by land.

9. Madrid Bend, KY

In 1811 and 1812, earthquakes caused the Mississippi River to flow backward. As it did so, it cut off this small piece of Kentucky land, which is now on the Tennessee side of the river even though it’s still part of Kentucky.

10. Michigan’s Upper Peninsula

To scratch your head over this one, you won’t need a magnifying glass. Separated from the bulk of Michigan by Lake Michigan and Lake Huron, the Upper Peninsula, by logic, should be part of Wisconsin.

However, Michigan’s boundary follows the Montreal and Menominee Rivers as well as an imaginary line connecting them, and that line slices off the Upper Peninsula and makes it part of the Great Lakes State. At least you don’t have to go through another state or country to drive there, though, thanks to the Mackinac (ma-kuh-naw) Bridge.

Fun Fact: The Upper Peninsula, often called the “U.P.,” covers about 29% of Michigan’s land area but has only 3% of its population.

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This article was produced by Our Woven Journey. Featured Image Credit: Budabar/Canva