In May of 1960, the Rainbow Caverns Mine Train became the Mine Train Through Nature's Wonderland. This slightly fuzzy photo shows one of the banners that were often strung across Main Street, announcing the latest attractions (or to welcome special guests, such as the Directors of the Santa Fe RR).
Besides touting the shiny new Nature's Wonderland, you can see an additional plug for the Art of Animation exhibit which also made its debut in May of 1960.
At the other end of the banner there is a partially obscured segment...I am reasonably sure that it is advertising the new "America the Beautiful" Circarama film that was introduced only a few months before this photo was taken.
Sorry about the fuzziness, only puppies and kitties should be fuzzy!