Bhutan's mountainous terrains offer a fascinating adventure for bicycling enthusiasts. The route along Bhutan's West-East Highways (approx. 600 km) is an exciting route with challenges surmounting a new pass over 3000 meters everyday. The highways winding up and down mountains with drops of thousands of feet keep one too high on adrenal in to feel the slightest pinch of monotony. As one progresses along the route, there is a discernible change in the flora and temperature when one gradually descends, from the alpine heights, into the temperate regions of the East. All along the route the interruption by picturesque and almost medieval, villages and towns rich in cultural spots make a welcome diversion.