Constantine, like many other cities in Algeria, offers a relatively safe travel experience but it's important to be cautious. Petty theft, pickpocketing and scams primarily targeted towards tourists can occur. Public transportation and taxis are generally safe but it's recommended to use organized tour groups or private transportation services when possible. As in any destination, it's advisable to avoid venturing alone at night in less crowded areas. Respect local customs, particularly regarding dress code, can help reduce unwanted attention. Always remember to remain vigilant about your safety, stay aware of your surroundings, and trust your instincts.