The main Welcome to Fabulous Las Vegas sign, along with
the majority of the famous Las Vegas "strip", is actually in the town of Paradise, Nevada. While almost everyone will refer to Paradise
as "Las Vegas" the actual boundary to the city of Las Vegas is near Sahara. The "Welcome to Fabulous Downtown Las Vegas" sign is a few
blocks past the city line (which I don't believe is marked with any signage; or else I never noticed it.)