Even if you’ve been to Las Vegas dozens of times, you may not know there’s a secret, ultraluxe hotel hidden within the MGM Grand. Called The Mansion at MGM Grand, this hotel-within-a-hotel consists of 29 “Mediterranean-themed residences ranging from 2,400 square feet to 12,000 square feet” all within “an enclave of privacy and pleasure where the sensual riches of Tuscany reach their fullest expression,” according to the website. Translation: There’s a little Tuscan village, exclusively for the rich and famous, under a glass dome in the shadow of the famous green resort on the Las Vegas Strip. And guests staying in that VIP village get exclusive perks such as private…