10. Hart Island
Located in the western Long Island Sound, Hart Island lies in close proximity to the Bronx–yet it is often unheard and unspoken of. The island doesn’t appear on the MTA Subway Map or the Department of Transportation’s bicycle map. The 101-acre island serves as a separate burial ground, the city’s last potter’s field, for those who are either unclaimed or whose families couldn’t afford a funeral. The island is uninhabited today, but more than 800,000 dead has been buried there since 1869, making it the largest tax-funded cemetery in the world.