I know we've touched on this before, but I was in a nostalgic mood recently. The 24/7 outdoor hot tubs at the Stardust. The 'old-school' Vegas mini museum at the Trop. The 'secret' SWA passageway to C-Gate security. The sportsbook at the Stardust. The free Lon Bronson show band at the Golden Nugget. What's on your list?