Los Gigantes in Spain is generally safe for solo female travelers. It is a popular tourist destination with low rates of crime. As with any location, it's important to stay alert and aware of your surroundings, particularly at night. Local people are friendly and welcoming to tourists. Public transport is reliable and secure, though limited in some areas. Health facilities are also up-to-par in case of emergencies. However, just like in any other place, incidents can't be completely ruled out, hence it's advisable to take standard precautions.