Madame Tussauds is just a short walk away from the Harrah's stop on the Las Vegas Monorail.
Once you arrive at the station, pass through Harrah's to the Strip, turn right towards the Stratosphere, and pass by Casino Royale, and the Walgreens and Denny's building. We are just up the moving walkways past Sephora, under the green and white awnings by the Campanile Tower (brick bell tower).