­If you want to win a game of vacation one-upmanship, try casually dropping into conversation that you will be heading to Bhutan for your next holiday. This tiny kingdom is nearly impossible to get into it. Only 10,000 visitors are allowed into this remote country a year. The first luxury hotel to open there was Christina Ong’s Uma Paro in 2004  (she’s the hotelier behind celeb favourite Parrot Cay), followed by the Aman’s  Amankora. The latest luxury hotel to venture in Bhutan is the Taj, with the opening of the Taj Tashi in the capital of Thimphu. All the rooms have mountain views, and the décor combines traditional...