Guru Nanak Jhira Sahib is Bidar's main Sikh pilgrimage site, set below the old city around a spring traditionally linked to Guru Nanak. It is a living gurdwara rather than an archaeological stop, so visit with the same respect you would bring to any active shrine: cover your head, remove your shoes, and move quietly.
The shrine is most interesting as a reminder that Bidar's history is not only Bahmani and Barid Shahi. Pilgrims come from across the Deccan, and the langar kitchen gives the place a warm, communal feel that contrasts with the empty tomb fields elsewhere in town.