One of the things that I noticed is that the wall layout for the rooms at the Ramada in Lincoln and the Holiday Inn in Estes Park were nearly, if not completely, identical. There are a couple of possibilities, but one that is far from beyond reason, is that the Ramada in Lincoln was originally built as a Holiday Inn during the same time, and thus with the same room floor plan.
I also wonder which part of the Estes Park Holiday Inn was built first. There are two wings, the one at the back where we stayed, and one further forward. I'm pretty sure that they weren't built together since they probably would have been better connected -- even with the steep hill they were built on. But either could be the original hotel.
Finally, I've come to the very safe conclusion that the Sheraton in downtown Denver (which was an Adams*Mark until very recently) was built in two different parts. The hotel consists of two buildings across Court Place from each other. The "Tower" building is located on the Colfax side, appears to be much older and the original building. The hotel web site says that the building was designed by I.M. Pei, and I suspect that may be the tower building, since it has interesting architectural details. The plaza building is much newer -- possibly within the last 10 years. The thing that pretty much sold me on the idea that the hotel used to just be the tower building was when I went over there last night for the Aussicon Bid party and noticed that there is still a hotel registration desk in that building, even though the hotel registration is now in the plaza building.