December onwards brings crisp air, clear skies and snow-capped summits to the mountain realm, and winter nights are characterised by a pinprick panorama of stars. Although the temperature drops after dusk, days are still warm and pleasant – ideal conditions for hiking and exploring Bhutan's western districts of Paro, Punakha and Thimphu. From Aman Gangtey, the Phobjikha Valley is especially enchanting this season, as the rolling plains and bamboo shrub lands are populated by roosting cranes, and nomadic yak herdsmen usher their cattle down from the snowy highlands.