Sikkim, a Himalayan state in northeast India, has launched the revitalisation of the historic South Old Silk Route to boost sustainable tourism. The route, which once connected Kalimpong to Tibet, is being developed as an adventure and heritage trail featuring trekking paths, cultural landmarks, and eco-friendly travel experiences. Tourism officials say the initiative aims to preserve local history, support community livelihoods, and attract travellers seeking immersive, low-impact journeys rooted in nature and tradition.