an island in New York City
... that an island in New York City used to be a summer campsite, with up to half a million visitors by 1917?
... that <b id="mwIw"><a href="./Hunter_Island_(Bronx)" id="mwJA" rel="mw:WikiLink" title="Hunter Island (Bronx)">an island in New York City</a></b> used to be a summer campsite, with up to half a million visitors by 1917?