Believe it or not, the mobile version of Google Maps hasn't had support for multiple destinations. You could plan that multi-city tour on the desktop, but you'd still have to navigate one stop at a time on your phone. You might not have to the next time around, though: Google is quietly pushing what appears to be a server-side update to Maps for Android that lets you set multiple stops. You can navigate to a tourist trap, a restaurant and your hotel without having to enter fresh directions every time.