Over 600,000 Jews, particularly Orthodox and Hasidic Jews, have become concentrated in Borough Park, Williamsburg, and Midwood, where there are many yeshivas, synagogues, and kosher restaurants, as well as many other Jewish businesses. Other notable religious Jewish neighborhoods are Kensington, Canarsie, Sea Gate, and Crown Heights (home to the Chabad world headquarters). Many hospitals in Brooklyn were started by Jewish charities, including Maimonides Medical Center in Borough Park and Brookdale Hospital in Brownsville. Many non-Orthodox Jews (ranging from observant members of various denominations to atheists of Jewish cultural heritage) are concentrated in Ditmas Park and Park Slope, with smaller observant and culturally Jewish populations in Brooklyn Heights, Cobble Hill, Brighton Beach, and Coney Island.