The Knickerbocker Field Club is a true hidden gem, and one of our favorite locations in our book Secret Brooklyn. South of Prospect Park off of Ocean Avenue is a short, two-block street with a “punny” name: Tennis Court. Most people who pass by probably chuckle and move on, if that. But Tennis Court was originally part of a larger development, much like Prospect Park South and Flatbush-Ditmas Park nearby, with Victorian-style detached homes set amidst lawns and gardens.