Jannat al-Baqi is the most famous Islamic cemetery, located adjacent to Nabi's Masjid. It contains the graves of many companions, wives, and family members of Nabi, including Uthman ibn Affan and Hasan ibn Ali. Nabi used to regularly visit and make doa for its inhabitants.
Visiting hours for men are typically after Fajr and Asr shalat. When visiting, recite the prescribed doa: 'Peace be upon you, O people of the dwellings among the believers and Muslims. Indeed, if Allah wills, we will be joining you. We ask Allah for well-being for us and for you.'
Maintain a respectful, quiet demeanor. Do not walk over graves, lean on tombstones, or sit on burial plots. Photography is strictly prohibited. Do not make doa to the deceased but rather to Allah for them. Keep your visit brief and orderly during busy periods.