Thimphu, the capital of Bhutan is a lively, modern city that still maintains it's traditional charm and has many interesting sights including Buddha Point with it's huge gold statue of Buddha, Trashichhodzong, the seat of government, the Institute for Zorig Chusum (traditional arts and crafts college) , National Memorial Chorten, Simtokha Dzong and many others.
You may be surprised to find that Thimphu has a large selection of restaurants and cafes. Apart from traditional Bhutanese cuisine you can find Indian, Chinese, Thai, Italian and if you have never tried roast yak, then you can do so in Thimphu. There are some wonderful coffee shops and small cafes where you can get a lunchtime snack and a warm drink.
After a day's trekking or sightseeing you may want to wind down with a drink or two at one of Thimphu's many pubs or bars. There are also a number of live music venues, karaoke halls and nightclubs.
Thimphu is also a great location to pick up souvenirs and handicrafts. There are numerous shops and stalls around the city as well as at places such as the paper making factory, Folk Heritage Museum and the Institute for Zorig Chusum. Should you want to buy a gho or a kira then there a number of places that cater to tourists wanting to bring home the traditional dress from Bhutan.
A visit to the Takin Reserve is also an opportunity to see Bhutan's national animal. There are a number of takin and deer in large enclosures.
Thimphu is also a good place to pick up any electronics that you may need such as additional memory cards, batteries, travel plugs etc that may not be so easy to find in the remoter regions.
There are also so very pleasant hikes around Thimphu including day hikes to Tango Goempa and Cheri Goempa. Bike hire can be arranged as well.