When a building was razed in 1973 on Eldridge Street on Manhattan’s Lower East Side, local resident Adam Purple cleared the lot, gathered manure left by horse-drawn carriages around Central Park, and designed a garden laid out in concentric circles around a central yin-yang symbol. As nearby buildings were torn down he added further circles, until the garden filled 15,000 square feet with corn, cucumbers, cherry tomatoes, asparagus, black raspberries, and strawberries.

The city bulldozed Purple’s lot in 1986, but Richard Reynolds’ London-based blog now documents similar “guerrilla gardening” initiatives around the world.