update October 11th: went over 2000 views and 100 favs on the same day...both firsts for me. Thanks everybody for viewing/faveing.
Spiral Staircase in the Vatican Museum, Rome. It is actually a double helix. Designed in 1932 by Giuseppe Momo, the staircase is composed of two different spirals -- one to walk up to the exhibits, and one to leave the museum.
-Added to theCream of the Crop pool as most favorited.