Built between 1533 and 1540 by Mughal emperor Humayun and later strengthened by Sher Shah Suri, Purana Qila (Old Fort) in New Delhi is one of the city’s most atmospheric and historically significant monuments. Its expansive lawns and quiet pathways make it a serene escape from Delhi’s bustle, while evening sound‑and‑light shows narrate the city’s layered history.