Wengen is a well-regarded destination known for its safety and tranquility. As a solo female traveler, you should feel especially secure given the low crime rates and the locals' reputation for being courteous and helpful. Public transport, such as the train service, is reliable and safe. The town itself is small, making it easy to navigate and people are generally respectful of individual travelers. As with any location, though, always pay attention to your surroundings and follow basic safety precautions.