Tourism is one of the world's fastest growing industries and an important source of foreign exchange and employment for many developing countries. Tourism, identified as one of the tools to increase the economic benefits to small isolated states with diverse natural beauty in India, through Sustainable tourism Development Goals. There is a close linkage of tourism to other sectors and its ability to create decent jobs and generate trade opportunities. Therefore, because of the reorganization that there is a need to support sustainable tourism activities and relevant capacity building that promote environmental awareness, conserve and protect the environment, respect wildlife, flora, biodiversity, ecosystems and cultural diversity, and improve the welfare and livelihoods of local communities. The sub-Himalayan Sikkim, smallest state in India, is endowed with impressive varieties of tourism products including nature and trekking based tourism, eco-tourism, wildlife tourism, wellness tourism etc. Owing to its multi-dimensional diversity tourists, arrivals have been increasing during the last decade. The main aim of the study is to understand and analyze the best practices of the sustainability of tourism practices in the state on the basis of four main criteria that is Conservation, Community, Culture, and Commerce, initiated by the state. Understand the practices initiated by the state that are mainly devoted to the promotion of sustainable human settlement development, the promotion of the formulation of sound and culturally sensitive tourism programmes are seen as a strategy for sustainable development of urban and rural settlements and as a way of decentralizing urban development and reducing discrepancies among regions. The important role of ecotourism as a tool to promote economic growth in respect of environment sustainability is a recurring theme in particular with reference to the protection of forests, mountain ecosystems, improvement of farm production and farming systems, sustainable conservation and use of living resources.

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Keywords: Sustainable Tourism, Environment Sustainability, Conservation, Community, Culture.