By happy coincidence - though Buddhists will tell you that there's no much thing as coincidence - I ended up in Chiang Mai during the Loi Krathong and Yi Peng festivals (the latter overlaps with the former). I released a small float ornamented with orchids, incense, and a candle, into the Ping river in the spirit of Loi Krathong. Then, watched hundreds of floating lanterns be released into the sky.
It was the most beautiful thing I've ever seen.