The Presidio Museum is the founder and steward of the popular Turquoise Trail. The Presidio Museum endorses guides who are knowledgeable, entertaining, and have stories to share. Follow the turquoise line through downtown Tucson and admire local Spanish Colonial architecture and other historic sites. This walk gives you a glimpse into early Tucson! More than 30 restaurants are within a few blocks of the walk, providing plenty of opportunities for lunch after the tour ends.