With the exception of the Gasa district, all major towns in the 20 districts of Bhutan are accessible by road. Despite high mountains, steep slopes, and the deepest of valleys Bhutan has a relatively well developed network of roads. That said, rarely will one find a length of either straight or flat road. In some stretches one can encounter 6 to 7 bends per kilometer! Steep ascents and descents are characteristic of road travel in Bhutan and this can make travel much slower than one may be used to. Average speeds for road travel rarely exceed 30 km/h, with tourist buses making even slower progress. One is however handsomely rewarded for the long and sometimes tiring car journey, by the spectacular views of towering mountains, lush green jungle, ancient villages and majestic monasteries.