Escaping a Delhi summer is too tantalising to turn down, but the sight of Tripura&rsquos rolling green land, as our plane descended on Singerbhil airport in Agartala, was a bigger relief than I imagined. To parched eyes longing for green trees and cool shade, Tripura seems like paradise. Like most people outside the Northeast, I knew next to nothing about the state, but having got the chance I was determined to find out. I was armed with books, printouts, more books, a carefully devised itinerary and a plan to cover as much of the state&rsquos cultural landscape as possible.