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Immortalized in Washington Irving’s story (and later Tim Burton’s film) about the murderous Headless Horseman, Sleepy Hollow is proud of its exceptionally creepy lore (to wit: Sleepy Hollow High School’s athletics team is the Horsemen). The Sleepy Hollow Cemetery (540 N Broadway; 914-631-0081, sleepyhollowcemetery.org; free) is open daily from 8:30am to 4pm, giving day-trippers plenty of time to explore the 90-acre grounds. You’ll find almost as many famous New Yorkers there as at Brooklyn’s famed Green-Wood: Take your own self-guided tour (free maps are available), and look out for the graves of Elizabeth Arden, Brook Astor and, yes, Irving himself. Travel: Metro-North’s Hudson line to Philipse Manor
The Met’s medieval art and architecture outpost—set in a lovely park overlooking the Hudson River—looks most leafy and romantic in harvest season. A path winds through the peaceful grounds to a castle that seems to have survived the Middle Ages. (It was built a mere 70 years ago, using pieces of five medieval French cloisters.) Check out the famous Unicorn Tapestries, the 12th-century Fuentidueña Chapel and the Annunciation Triptych by Robert Campin, all of which will have you singing Gregorians in no time. 99 Margaret Corbin Dr, Fort Tryon Park, Washington Heights (212-923-3700; metmuseum.org)