Djemaa El Djedid, also known as the New Mosque, is a significant historical and architectural landmark located in the heart of Algiers' UNESCO-listed Casbah. It is easily accessible by foot once you reach the Casbah area, though navigating the Casbah's narrow, winding streets is often best done with a local guide, especially for first-time visitors, as opposed to a purely solo visit. As a functioning mosque, visitors should be aware of potential restrictions during daily prayer times and major Islamic holidays; it is generally open to visitors outside these hours during daylight. There is typically no entrance fee, though respectful donations are appreciated. A visit to the mosque itself usually lasts 15-30 minutes, but it is often integrated into a longer 2-4 hour exploration of the surrounding Casbah. Essential insights include dressing modestly (covering shoulders and knees for all, and women often requiring a headscarf) and removing shoes before entering the prayer hall; photography is generally permitted respectfully.