Hi Vikas, West Bengal is ripe with trekking opportunities. The following treks come with a healthy dose of breathtaking adventure, scenic vistas and wildlife spotting: Sandakphu Trek, Singalila Ridge Trek, Phalut Trek and Goecha La Trek. For more information regarding the treks read the attached article.
How about a trek with amazing views of Mount Kanchenjunga, Mount Kabru and Mount Pandim, that too with a moderate difficulty level. Sounds good ? Then try Neytham Holy Cave Trek