Santa Teresa Gallura is an incredibly safe destination for solo female travelers. The locals are friendly and respectful, public transportation is convenient and reliable, and the overall crime rate is exceedingly low. It's a small town, making it easy to navigate, and it's also quite popular among tourists, so locals are accustomed to helping out and ensuring the safety of visitors. As with any trip, maintaining awareness of your surroundings is advised, but overall, you should feel comfortable exploring this beautiful location.