Spent a nice week in Lexington a couple of years ago. Three Chimneys was great. But also available, but not really promoted, and just jaw dropping in stallions to stare at, is Darley. Called them up expecting them to say they didn’t do tours, and to the contrary, they were very friendly. One of my favorite moments looking at Street Cry in a paddock next to Medalgia D’Oro - wondered if they ever talked about their girls. 
Also Bernardini, Hard Spun, Elusive Quality. Sigh… 
And some jaw dropping Eclipse award and other trophies in the “front office”.