Holy Cow Casino used to exist at the northeast corner of Sahara and Las Vegas Boulevard. Following that Ivana Trump had a sales office on that site for a high rise which was never built. (Just as well, it would have been like building a skyscraper on the footprint of a 7-11.)
Something is being built there right now, however, as can be seen in the photos of the construction framework. The photos from top to bottom rotate south to show the geographical relationship to SLS Las Vegas which is due to open later this month.
Here is a link to an old post of mine in which I covered the demolition of the building which was Holy Cow Casino. http://royvegas.blogspot.com/2012/05/holy-cow-casino-demolition-las-vegas.html