Tassili n'Ajjer, a UNESCO World Heritage site in the Algerian Sahara, is a remarkable destination renowned for its ancient rock art and unique geological formations. Accessibility is challenging, requiring 4x4 vehicles and typically departing from Djanet, making **guided visits mandatory**; independent travel is strictly prohibited, and visitors must arrange tours through official agencies and licensed guides, often requiring special permits. The ideal time to visit is during the cooler months from October to April, as summer temperatures are extreme and inhospitable. A typical visit lasts 5-7 days to fully appreciate the vast landscapes and numerous rock art sites, involving desert trekking and camping. Costs are significant, encompassing permits, vehicle rental, guide services, provisions, and equipment, potentially ranging from several hundred to a few thousand USD depending on duration and tour type. Visitors should be in good physical condition and prepared for a rugged, off-grid experience, while also monitoring regional safety advisories.