Photos from inside North Korean Ryugyong Hotel
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Construction began in 1987 but was halted in 1992 [...] resumed in 2008 [to be completed this year].
The unfinished building was not surpassed in height by any new hotel until the 2009 completion of the spire atop the Rose Tower in Dubai, United Arab Emirates.
It's interesting to note how the US basically just gave up in the early '70s: http://en.wikipedia.org/wiki/List_of_buildings_with_100_floo...
What happened in the early 1970s? It seems like that was the beginning of the decline of American power. Tall buildings construction seems symbolic of that.
I think the reason for no more tall buildings is the lack of space in the big cities - nobody's going to build a skyscraper in the middle of nowhere, after all :-)...
edit: found the HN discussion. http://news.ycombinator.com/item?id=4574100
Plus, building it in the middle of nowhere almost guarantees that it will become yet another abandoned property like the famous Chinese "ghost cities" and malls...
This is why the US has so much sprawl.
Spreading things out means sewer lines have to be longer, power lines need to go further, and more roads have to be built and maintained to get to these new destinations. Then there's the phenomenon of the more roads you have, the more roads you have to build to get around those roads since they take up so much space themselves, further complicating things.
It doesn't make economic sense on the whole, only from the perspective of a developer that doesn't have to build and maintain infrastructure. The carrying costs are borne by other parties.
Or the beginning of the realization that such buildings make little economic sense? After the 70s, local governments were far more reluctant to finance such endeavors ... with no subsidies, building them made even less sense.
Also, consider what happens to concrete being exposed like that for two decades. The concrete isn't meant for decades of weather, it's meant to be enclosed. The concrete degrades and becomes unsafe. Same thing has happened with a lot of the Dubai skyscrapers whose construction was halted, and they were only exposed for a few years (so says a Dubai contractor friend).
I doubt that their plan is to use the hotel exclusively as a giant antenna, but it's not unlikely that finishing the facade was a political priority, while operating the hotel is not.
[1] http://en.wikipedia.org/wiki/Orascom_Group
[2] http://en.wikipedia.org/wiki/Ryugyong_Hotel#Construction_res...