We happily recommend the following centres in Nepal with links to their web-sites;
Thrangu Tashi Choling Monastery (males) Buddhist teaching and meditation
Thrangu Tara Abbey (females) Buddhist teaching and meditation
Kamma Healing Center (Tai Chi plus)
Kathmandu Center of Healing (Yoga plus)
Kopan Monastery and Nunnery Buddhist teaching and meditation
Khumbu (Everest) Valley;
Lawudo Gompa Buddhist teaching and meditation
Ganden Yiga Chozin Buddhist Meditation & Retreat Centre – this calm place holds three-day meditation and yoga courses (USD 35 including lodging and meals) as well as daily sessions at 10am (USD 2) and 5pm (USD 1.5). The meditation and yoga room with a Tibetan altar and thangkas looks out over the lake.
Panditarama Buddhist teaching and meditation
Himalayan Buddhist Meditation Centre – this friendly place offers guided meditations and talks on Tibetan Buddhism, with free lectures Monday to Friday at 8.30am and 5.30pm and Saturday karma lectures with teachers from Kopan Monastery (USD 4 with lunch). The centre also offers yoga and reiki classes, a vegetarian restaurant, a library and a film night every Friday.
Here is a good web-site to check out other Meditation Centres.
For those more adventurous looking for a more rural and rustic setting please check out this site about a monastery and nunnery in the Tsum Valley. There are also some important monasteries in Upper Mustang; Ghar Gompa at Lo Gekar, at Geling, at Tsarang and 4 monasteries in Lo Manthang.