How do total park space, park space per capita, accessibility of parks, and other variables such as population and city area compare across 38 large American cities? Explore these and other questions in this interactive chart. Choose your variables by clicking on the labels for the horizontal and vertical axes and then indicate whether you wish to display the results on a linear or logarithmic scale. You can also change the variables represented by the color and size of the circles, which represent cities, and select the cities you wish to display. One curious pattern we have found: the only clear correlation is a positive one between the total area of cities and the total area of parks in those cities.