Sacré Coeur Basilica, Saint Jean de Montmartre Church, Dali Museum, Montmartre Museum, Saint Pierre de Montmartre Church. After the tour is over, you might want to walk down the hill to Rue des Martyrs, one of the most charming streets in Paris 1/2 mile away from where we end our tour.
Best time to start the tour is between 9 AM and 4 PM so everything will be open no matter what time of year you go. Parks and churches stay open until 7 PM in the summer.
Watch your belongings, there are pickpockets in Montmartre! Wear comfortable shoes, most of the pavement in Montmartre is cobblestone and you will be walking up-hill for several sections along the tour.