The Wasteland

This epic poem reads like a who's who of literary canon. Probably the most symbolic poem in literature, TS references hundreds of famous works through symbology. Eliot's poem loosely follows the legend of the Holy Grail and the Fisher King combined with vignettes of contemporary British society. I love the first line.
“April is the cruellest month, breeding
Lilacs out of the dead land, mixing
Memory and desire, stirring
Dull roots with spring rain.”

I mean, it's The Wasteland.