Blood Wedding
A bride runs off with her former lover on her wedding day, and two men die. Lorca fused Spanish folk tradition with surrealist poetry to create something unlike anything else in modern theater. The Moon and Death appear as characters. It's based on a real newspaper story, but Lorca turned it into myth.
In the last act the Moon walks on as a young woodcutter and Death arrives as a beggar woman, and whether that plays as vision or as costume party depends entirely on the production. The characters are archetypes with capital letters, the Mother, the Bride, which is the point and also the limit. And it is a poem before it is a play: in translation you are reading the libretto and imagining the opera.
The case for it and the rest of the canon open with Pro.
