I have visited this Las Vegas landmark many times, as it is just south of the Strip. This is the famous sign that welcomes all visitors to the city, its the same sign featured in all the movies filmed here.
It is always full of people as any and every tour bus stops here. There is parking in the middle of the road but only accessible if your going south bound on Las Vegas BLVD. Great place to take pictures, as you can see the Las Vegas Strip right behind the sign. I cannot seem to decided if its better at night or during the day time. During the day you can see clearly all the hotels and landmarks, however, at night the sing is lit up much like the rest of the city.
No matter what time of day this Las Vegas Landmark is a must see, plus its free!