I once had the great misfortune to have to sleep over night in the DIA. I was woken up about every 15 minutes by one un-neccessary anouncement after another. (You'd think that at three in the morning there would be very few people leaving un-attended baggage ANYWHERE, much less in the concourse.)
I vaugely remember murals but was so tired they must not have registered. I arrived there around 2000 hrs., my flight wasn't scheduled to depart until 0830 the next day. I had been travelling since 0745 on the day I tried to sleep in DIA.
I haven't flown since.