Complete anecdote here, but I live on a park that is about two acres big. Its filled with large old (~100 years) trees and lawns, though it does also cram in a

Complete anecdote here, but I live on a park that is about two acres big. Its filled with large old (~100 years) trees and lawns, though it does also cram in a basketball court and two tennis courts. In the summer heat, when we walk around our area, the temperature astonishingly drops about 5 degrees once you get within 2-3 blocks of the park. Its striking in how noticeable it is. I have no idea why, but it seems even a bit of green space can have a big impact.