If there is only 1 thing that you must do in your Cherapunji visit is the trek to the double root bridge. We did the Double root bridge trek immediately after our bhutan visit where we did the trek to Tigers Nest. I must say that Double root bridge was definitely twice as better than Tigers Nest Bhutan. Plan your travel in such a way that you start the trek in the morning - come back same day late afternoon and then either stay back in Cherapunji or head towards Shillong for a night stay. The trek takes you down to a series of tiring "steps" along the mountain eventually to a river. Along the way you will get a chance to see some of the rare orchid flowers, a host of reptiles and experience "nature" 1st hand. The river crossing is probably the most memorable experience. Its a long long walk along a metal rope bridge around 40-50 feet above the river and you are literally balancing yourself on the single metal rope. if you are not careful there is a high probability that you might slip in from the gaps straight into the river. Its scary - yes - at the same time fun to do. Then starts a tiring walk upto the village and eventually to the double decker living root bridge. there is an option for a home stay up in the village as well. I'd highly recommend folks to visit this "one of its kind in the world" double decker living root bridge.