One of the New York City’s best-kept secrets, The Hebrew Home at Riverdale is a treasure trove of unexpected delights. The permanent and rather eclectic collection housed there contains more than 5,000 works of art. Prepare to be surprised by the array: Around one corridor, Andy Warhol’s “Ten Portraits of Jews of the Twentieth Century,” around another William Wegman’s iconic Weimaraner photos. Here an Alex Katz, there a Picasso, or lurking behind a column, a Ben Shahn or Louise Nevelson. And be sure to stare back at the “Portrait of Thomas Chaloner,” from the school of Anthony Van Dyck (c. 1630s) with its eponymous subject coolly gazing out at diners in the facility’s River Café. The sculpture garden, with its sweeping view of the Hudson River, includes work by Herbert Ferber and Menashe Kadishman. And, in the hallways, don’t miss the collection of Madame Alexander First-Lady Dolls.