By the beginning of May, Isaan is desperate for rain; there may not have been a significant downpour for six months and the rice crops need to be planted. In northeastern folklore, rain is the fruit of sexual encounters between the gods, so at this time villagers all over Isaan hold the bawdy, merit-making Bun Bang Fai rocket festival to encourage the gods to get on with it. The largest and most public of these festivals takes place in the provincial capital of YASOTHON, 98km northwest of Ubon, on a weekend in mid-May (check with TAT for dates). Not only are the fireworks spectacular, but the rockets built to launch them are superbly crafted machines in themselves, beautifully decorated and carried proudly through the streets before blast-off. Up to 25kg of gunpowder may be packed into the 9m-long rockets and, in keeping with the fertility theme, performance is everything. Sexual innuendo, general flirtation and dirty jokes are essential components of Bun Bang Fai; rocket-builders compete to shoot their rockets the highest, and anyone whose missile fails to leave the ground gets coated in mud as a punishment.

At other times of the year, Yasothon has little to tempt tourists other than a handful of unremarkable wats and a few evocative old colonial-style shopfronts near Wat Singh Tha at the west end of Thanon Srisonthoon.

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