Those three pics are from IMS, the top one with the Conti tire is from the Grand-Am test a couple weeks ago in preparation for next Friday's 3 hour race on the combined oval-road course at the speedway. Not sure how something as large as the one at IMS would look at Le Mans. From my memory of the tribunes at LM, the stands are not that towering, and a scoring tower like that might look a bit out of proportion to the structures around it. They do have some value though, there are similar scoring towers at Daytona, and they're especially visible at night. However they do get a bit blurry as the race goes along...oh crap, that's from the beer consumption.
Fax