Riding a motorcycle through Bhutan&rsquos unspoilt lush, high valleys is magical, almost spiritual. Almost all the country is mountainous and over two-thirds is densely forested, carved by furious rivers that vent their ire on banks far below the road. This dramatic landscape is coloured by mighty dzongs (fortresses) and monasteries, fluttering prayer flags that release invocations, prayers and mantras into the wind, lonely chortens and people clad in vivid traditional attire. Bhutan is a world apart, a sequestered realm that the locals call Druk-yul, &lsquoLand of the Thunder Dragon&rsquo.