I have the good fortune to live near a small stream that serves as a resting place for water and other things that runs down the drains in the street to prevent flooding.
Thankfully I live far enough away that I can't smell this, but sometimes I can a nice odor when I'm out walking my dog in this direction. One day I came across this very surprising site. Essentially on the side of the slope to this death odor stream, somebody made a small farm.
There are many different levels to it, and the secret walkways through it seem incredible. But I guess the water waste that feeds the stream is also great fertilizer for these plants and vegetables. Kind of makes me think more about where the food I buy at the market is grown.