It's a common misconception that it's *impossible* to visit North Korea, but there are actually quite a few programs in place. Mountain Travel Sobek, for example, is a company that brings people through a tour of North Korea. Look it up if you're interested!
No I'd probably end up in prison pretty quick, I have a bad habit of criticizing most governments (even my own) because almost all of them have some major failures involved.
https://en.m.wikipedia.org/wiki/Koryo_Hotel
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You're probably thinking of the Ryugyong Hotel, the tallest building in North Korea, which is not finished and perhaps never will be.
https://en.m.wikipedia.org/wiki/Ryugyong_Hotel