About an hour&rsquos drive south from Asola over horrendous roads leads you deep into the northern fringes of the Aravalis. Scrub and thorn forests predominate and the land rises. This part of Haryana is infamous for the mining nexus that has illegally carved open large chunks of this ancient range. But Mangarbani, for now, is different. It isn&rsquot a notified forest or a sanctuary, but this remote valley has been able to preserve a bit of the Aravalis in pristine condition. Fed by a seasonal stream, it is sacred to the memory of Gudariya baba, a mystic who has a striking domed shrine deep inside the forest. For a few hundred years now, the villagers of nearby Mangar, Bandhwari and Baliawas have kept the forest free of grazing to abide by Gudariya baba&rsquos wish that no harm should come to his forest. This has resulted in a thickly wooded valley, about a 100 hectares in area, filled with trees &mdash like the dhau, the kala siris and the salai &mdash which have all but disappeared from Delhi. These trees stand around in wild profusion, and the dhau, with its wayward trunks and phantasmagoric branches, is the closest thing I&rsquove ever seen to an Ent in real life. Tree pies and babblers seem to love it here, as do parakeets, with the dhau providing the perfect home. The forest is also home to jackals and nilgai, which I didn&rsquot see in the noonday heat, but is overrun by peacocks. We couldn&rsquot take five steps without a crashing sound in the dense undergrowth around us, as a peacock scrambled away with a squawk. Clumps of peacock feathers are lying around these are the preferred offerings to Gudariya baba. We climb out of the valley and up to the northern lip of the enclosing ridge. Here, the forest cover thins a little, and giant boulders appear &mdash knobbly rocks almost 150 million years old. I feel a shiver through my spine just to imagine such antiquity. And yet, there they stand, beloved of geologists and quarrymen, some of the oldest thing on the subcontinent. From up here, Gudariya baba&rsquos shrine looks even more dramatic. Sunbathing lizards scamper for cover. It&rsquos all indescribably peaceful, and I find myself praying that it stays this way.