Atenas is generally a safe location for solo female travelers. The locals are usually friendly and helpful. Petty crime, such as pickpocketing and bag snatching, could happen in crowded areas though, so it's important to keep an eye on your belongings. As with anywhere, caution should always be exercised especially at night. Walking alone at night is not recommended; it's better to use a taxi. Touristic areas and accommodations normally have good security.