Paro is the airport of Bhutan and your most probable point of entry. It’s not a bad place to start: the valley is one of the most beautiful in Bhutan.
Among the sights are the Ta Dzong temple the Rinchen Pung Dzong temple and the Dungtse Lhakhang temple. It is also the home of Bhutan’s oldest monsatery, Kyichu Lhakang which dates to the 7th century.
Paro has an interesting market, held in the weekend, where you can see local produce, local handicrafts and items imported over the mountains from Tibet.
There are many great day walks in the valley and it is also the best place from which to visit the remote Haa Valley, a two hour drive west over the highest road pass in Bhutan.