On the northern edge of the old city, Gurdwara Haji Ratan stands on a spot believed to have been visited by Guru Nanak around 1515 — and, in older Sufi tradition, by the saint Baba Haji Ratan centuries earlier. The white-domed gurdwara is set in a walled compound with a large sarovar (sacred tank) where pilgrims bathe before entering.
It is one of the quieter, more atmospheric Sikh shrines in southern Punjab, a working pilgrimage site rather than a tourist sight. Cover your head, leave your shoes outside, and stay for langar — the free communal meal served to anyone who walks in.