The Hindustan Paper Corporation Ltd. (HPC) located in Silchar, Assam, India was once one of Asia's largest paper mills. While it's not currently operational, it can still be a point of interest for some travelers, particularly those interested in industrial history or urban exploration.
Reviews on travel websites like Tripadvisor suggest that the HPC itself is not much to look at these days. The most recent reviews describe it as dilapidated and not well-maintained [Tripadvisor]. However, the Cachar Paper Mill, which is part of the HPC complex, played a significant role in the development of the region and provided employment for many locals for many years [hindpaper.in].
If you are still interested in visiting, keep in mind that this is an industrial site and not a public park. There are no tours offered, and getting permission to enter the property may be difficult. It's best to check with the HPC before making a special trip.