Most visitors to Bhutan will arrive by air at Paro International Airport which has connections to Bangladesh, India, Nepal, Singapore and Thailand. It is a very pleasant town, easy to wander about on foot with numerous craft and souvenir shops and some good restaurants. The enormous dzong is built on a steep slope above the town. A traditional wooden bridge spans the Paro Chhu river below the dzong. The national museum can be found in an old circular watchtower above Paro Dzong which dates back to the 17th century. Just outside Paro can be found Kyichu Lhakhang, one of Bhutan's oldest Lhakhangs. It is said do date back from the 7th century with additional buildings added in the 19th century. Perhaps the most famous of all monasteries in Bhutan is Taktsang Goempa, commonly known as the Tiger's Nest Monastery. Most tours will include a hike to the goempa which is built precariously on the edge of a cliff. It takes around 5 hours for a trip there and back with a stop for lunch. and time looking around the goempa.
Driving to Haa from Paro, you will cross Cheli La pass at just over 3,800 m. If you stop here, there are some hiking trails that will give you great views of the mountains. The town of Haa itself is situated on the banks of the Haa Chhu. Sights include Wanchulo Dzong which was built last century, Haa Draktshang where the monk body are housed, Chhundu Lhakang, Juneydrak Hermitage, Yangtho Goempa and Tsenkha Goempa.