Dharma Bumming
Worldwide/Year Round: Goenka retreats (map)
USA
Soto Zen
Spring/Summer: Tassajara (Bay Area, California, USA)
Spring/Fall: Green Gulch (San Francisco, California, USA)
Year Round: Yokoki Zen Mountain Center (Southern California, California, USA)
Vipassana
UK
Vipassana
Year Round/Personal Retreats: Gaia House
Malaysia
Vipassana
Year Round: Dhamma Malaya - 10 day Goenka retreats
Year Round: Malaysian Buddhist Meditation Centre
Myanmar
(If the civil unrest cools down, sigh)
Vipassana
Thailand
Vipassana
Year Round:
Wat Ram Poeng
YearRound: Wat Suan Mokh - 10 day retreats
at the beginning of every month
Year Round:
International Buddhist Center at Prathat Doi Suthep -
4-21 day courses (flexible, 21 day “Foundation” course is probably what you want
though) Year Round:
Wat Chom Tong - 21 day course,
Chiang Mai (seems intense as fuck, probably the more hardcore option)