Another thing about radioactiveland–I mean New Mexico. Guess where the first atom bomb was detonated.
I’ll give you a hint–it wasn’t Hiroshima.
^^ I was surprised to learn that a nuclear device was detonated in MS also, in 1964. I had no idea.
Given as how Vulcan is only about two hours by car from Montana, I’m pretty sure there have already been many contacts between Montana and Vulcan. 
As already pointed out - Hawaii
Arguably - California
New York:
…is the only state whose state capitol building does not have a dome.
…has the largest state park in the US: the Adirondack Park. It’s bigger than Yellowstone, Everglades, Glacier, and Grand Canyon National Parks combined.
…is the only state where portions were under Dutch rule twice.
…is the only state to host two Winter Olympics.
…is the only state with a legally blind governor.
It’s not a mansion by any stretch, but The Pavillion does have a small apartment for the governor to use in emergencies or when the legislature is in session. California, Massachusetts, and Rhode Island lack a governor’s mansion too. I think there may be a few other states that don’t have one.
It’s getting better. Some supermakets have managed to get their cafe areas classified as restaurants and sell beer to go. Two of my local supermarkets do (Wegman’s has a pretty good selection). The LCB has also been experimenting with opening small liquor outlets inside supermarkets, but staffed by LCB workers. I’ve never actually seen one. I know of at least one place that’s partnered with a winery to sell it’s products in a small area of the store.
Missouri is the only state to be bisected by a river of the same name. Some other states have same-name rivers somewhere in their territory, but not one which cuts the state neatly into two almost equal halves.
It was where the first construction of the interstate highway system started.
It’s the only state I know of to have a section of interstate highway “adopted” for litter cleanup by the KKK. Though IIRC that never *quite *came to fruition.
It’s the nation’s foremost producer of lead … and lead-caused defective children.
South Carolina is the only state that natively has all three barbecue sauces.
California is the only place where the Giant Sequoia occurs naturally.
I may be the only guy from Carefree, AZ who was at both places within two days. When I climbed Mt Whitney, drove back through Badwater. The temperature then was 128. Above, that is.
Nevada:
More atomic bomb explosions than any other state… possibly more than any other place in the world… and a cancer rate to prove it.
I could swear the term “bogue” has been discussed here before and that the meaning used in Michigan is used somewhere else (but there was agreement that the Michigan definition of bogue was in very limited use). This was all I could find, though, as far as definitions go.
Bubbler and soda/pop have been discussed here before. Here’s a thread with a soda vs pop vs Coke map linked from it. Wikipedia makes it sound like it was a term trademarked by a Wisconsin company (Kohler) and says that it’s also used in Australia. Here’s an article with more info on bubbler, which is apparently said in Rhode Island and part of Massachusetts as well. And here’s a dialect map. (There are intersting maps for all kinds of pronunciations and vocabulary choices linked from this page.)
As for Ohio, seems to me I’ve read that the Ohio Statehouse’s architectural style is unique among state capitol buildings, but I’ve looked at several sites now and none of them contain this statement. So maybe it’s just unusual; this link includes a picture so that you can judge for yourself.
Well, outsiders routinely mispronounce Illinois. The s is silent. One of the areas we do seem special is politics. Just check out our recent governors. Perhaps because there is no limit on campaign contributions.
Indiana is the only state with a nickname (“Hoosiers”) which the residents use proudly but have no idea why.
Which is fodder for some funny explanations by Dave Barry
…except Arkansas. 
On Craigslist last month a woman was trying to sell a cabinet and she called it a “hoosier”. I’ve never heard the word used in that manner. Have you?
Vermont was a republic.
I’ll also point out that Vermont has but a single 7-11 store, located in Bondville.
check out Hawaii.
New South Wales is apparently the only state whose residents realise that there are states outside the USA.
What else … hmmm … how about, it’s the only state which had bits lopped off it to become two entire other states? They being Victoria and Queensland.
Pretty much universal here in Australia.
I’m not positive that these are exclusively New Jersey-isms, but…
I think NJ is one of two states where you cannot pump your own gas. Not that I am complaining, I certainly don’t want to get out of the car and handle a smelly gas pump when I am dressed for work in high heels on a cold, rainy day. But, sometimes when you’re in a hurry, it seems like FOREVER before the attendant comes back to remove the nozzle.
We also still have “jughandles” - where, in order to make a left turn at an intersection, you have to take a right-side exit lane that creates a - wait for it - road shaped like a jughandle to the side of the intersection and cross the street. Does anyone else still have these?