When traveling alone in Rio San Juan, the Dominican Republic as a female, it's important to be aware that precautions are necessary like in any other foreign cities. Daylight hours are generally safer for exploration than the night times. Locals are generally friendly but of course, it's crucial to avoid secluded areas and always being aware of your surroundings. You should always keep your belongings safe and secure as petty theft can be a problem. However, violent crime rates are relatively low. Useful safety measures such as not displaying expensive items in public, using trusted transportation, as well as learning a few phrases in Spanish could help your experience be more comfortable and secure.