North Dakota?

I was on a field trip the other day and the bus driver was talking to me about this tower. It is the tallest structure in the world and it is in North Dakota of all places.
I found this article about it on this site http://en.wikipedia.org/wiki/World's_tallest_structures

The tallest currently standing structure on land is the KVLY-TV mast near Mayville, North Dakota, at 629 m (2,063 ft). It is a transmission antenna, consisting of a bare metal structure supported by guy-wires. The Warsaw radio mast at Gabin-Konstantynow near Warsaw, Poland at 645 m (2,115 ft) was taller, but it collapsed on August 8, 1991. Masts such as these are generally not considered 'tall buildings', primarilly because they are not self-supporting. They require guy wires to remain upright. For greater detail on communication masts, see either List of the world's tallest structures, List of masts, or Table of masts.