Chauburja Mosque is a ruined Tughlaq-era mosque on Delhi's North Ridge, near the entrance to the DDA park north of Hindu Rao Hospital. It was built under Feroz Shah Tughlaq and once formed part of a hunting landscape with Pir Ghaib and a baoli.
Only part of the original four-towered structure survives, but the remaining dome, arched entrances, and bastions still show the spare, defensive feel of Tughlaq architecture. It is a quiet stop for travellers tracing Delhi's older Sultanate sites beyond the headline monuments.