Thimphu is the capital city, therefore the most populated district in the country, with about 1,00,000 people. Many of the monasteries, temples and handicrafts, can be reached on foot, you can spend several days in Thimphu easily visiting all sights. This is a good way to understand the culture, traditions and see the lifestyle of the Bhutanese Societies.
There are many attractions in and around Thimphu Valley, including, monasteries, a mini zoo, archery fields, restaurants, handicraft shops, a traditional paper factory, a radio tower BBS (which will give you a spectacular birds eye view of Thimphu valley).