Jahanpanah City Forest

Sprawling across roughly 435 acres between Greater Kailash, Chirag Dilli and Tughlakabad Extension, Jahanpanah City Forest is one of South Delhi's largest and least manicured green spaces — closer to genuine forest than to a formal park.

• There are no fountains or flowerbeds here; instead, gravel and mud tracks roll over the low undulations of the Delhi Ridge, stitching together loops that a fit walker or cyclist can extend to about seven kilometres in a single unbroken circuit.
• Regulars arrive at dawn to run beneath a dense canopy, and the rolling gradient — rare in table-flat Delhi — is precisely what draws serious runners and weekend cyclists.
• The forest is a working restoration project.
• For decades it was dominated by thirsty, thorny vilayati kikar; the Forest Department has been steadily replacing it with native species, and the returning undergrowth now shelters a surprising amount of wildlife for an inner-city site.
• Peacocks call from the branches, nilgai (blue bull) graze in the clearings at first light, jackals slip through the scrub at dusk, and birders tick off parakeets, owlets, hoopoes and migratory visitors around the seasonal water bodies.
• It is a place to hear leaves rather than horns.
• History is folded into the greenery.
• The forest takes its name from Jahanpanah — 'Refuge of the World' — the fourth of Delhi's seven medieval cities, laid out by Sultan Muhammad bin Tughlaq around 1326–27 to wall together the older settlements of Qila Rai Pithora and Siri against Mongol raids.
• The octagonal Bijay Mandal, thought to have crowned Tughlaq's thousand-pillared audience hall, rises just beyond the forest's western edge, and crumbled stretches of the old rubble ramparts still surface among the trees.
• For vegetarian travellers, the forest itself asks nothing but a water bottle — there is no reliable food inside, so carry your own fruit and nuts.
• Once you exit, you are in the heart of pure-vegetarian South Delhi: Sagar Ratna's crisp dosas, the Hauz Khas Village classic Naivedyam, and the thali counters at Saket's Select Citywalk are all a short ride away, so plan the walk as a morning and eat well afterwards.
• Entry is free and the gates — chiefly the Greater Kailash-II and Tughlakabad Extension sides — open from dawn to dusk.
• One honest caveat: this is Delhi, and from November to January the winter smog can be genuinely thick even under the canopy; on high-AQI mornings an N95 mask is sensible, and it is better to skip a hard run altogether.