The stupa identifying where Buddha was fed poison rice is called Chandi Mow.
Chandi Mow/Pushkarni lake: I will quote page 151 last para, “To the north of this place not far off, there is a very deep ditch, by the side of which is built a stupa where Srigupta ‘Shie-li-kio-to’wished to destroy the Buddha by means of fire concealed in the ditch and poisoned rice.” Srigupta covers the fiery ditch. The villagers hear about this and warn the Buddha about the plot. The latter still goes and crosses the ditch. The fire turns into a lovely lake with lotus flowers. This is why the place is called Pushkarni lake. Satellite pictures show a lovely lake by that name. When the Buddha eats the poisoned rice and nothing happens to him, Srigupta becomes a follower.
Buddha, Buddhism. Kill Buddha, poison rice.