The northeastern corner of Colorado is prairie. You cross flatlands or gently rolling hills and there are not a lot of physical features to provide interest. For many travelers on I-70 it is just an area to get through on their way somewhere else. That doesn't mean it has to be totally boring, though. If you're coming into the state from Nebraska it is actually more interesting, nearly as fast, and a little shorter to take US 34, which enters Colorado just east of Wray. This especially makes sense if you are headed to Estes Park, which is on US 34 when you get into the mountains.
Click on the thumbnails to see images of US 34 between Akron and Otis and at the state line.