Montmartre is an excellent place to wander. As with other tourist spots in any big city, there were scammers to avoid, crowds of others who had the same idea as you and a good reason why it made the map. Having spent only one afternoon there, I would love to go back with more time to take it all in. Matt Barrett gets it right with his A Walk Through Montmartre overview. Being an admirer of Dali, we had to check out ESPACE DALÍ. If you try real hard, you may be able to tell which image was taken there.