Duque de Caxias is a city in Brazil that presents some challenges to solo female travelers. While there are many wonderful aspects of Brazilian culture and some parts of town are quite safe, overall, the area does carry a high degree of crime including theft and assaults. It's paramount to maintain a high level of vigilance at all times and ensure you have adequate travel insurance. It is also recommended to research which neighborhoods to avoid, especially after dark, and utilize reliable transportation methods. Also be aware of the local customs and respect them, specifically, behave discreetly and dress modestly to avoid unwanted attention. Always share your whereabouts with someone you trust or use GPS tracking apps for safety. Remember your journey is as safe as you make it, so always prioritize safety over adventure.