Chasing waterfalls? EAT New Amsterdam Market What: Hoping to become a permanent fixture, tons of local purveyors show off farm-fresh cheese, produce, meats, and prepared foods — with a focus on sustainability. Why: Bread (from FCI to Sullivan Street), honey, mushrooms, and other mouth-watering groceries. When: Sun., 11 a.m.-4 p.m. Where: South Street Seaport, South St., b/t Beekman St. & Peck Slip. NYC Icy What: Frozen treats from newly opened mom-and-pop shop (with Manhattan and Brooklyn branches) come in icy (lychee, mango basil) and sherbet (milk and cookies, hazelnut chip) flavors that change daily. Why: Hell’s officially frozen over. When: HK, Sun.-Wed., 11 a.m.-midnight; Thurs.-Sat., 11 a.m.-2 a.m.; Brooklyn, daily, 11 a.m.-10 p.m. Where: 628 Tenth Ave., b/t 44th & 45th Sts.; 905 Church Ave., at Coney Island Ave., Kensington (347-789-1849). HEAR Fortification What: Castle Clinton’s drawbridge is lowered for a night of world music and dancing in plein air — with live performances, fine DJs, and bands. Why: Proceeds benefit Figment (a huge volunteer-run arts event at Governors Island, Fri.-Sun.). When: Sat., 6 p.m.-midnight. Where: Castle Clinton, Battery Park, 1 Bowling Green. BUY Sophomore Sample Sale What: T-shirts, pullovers, and hoodies for guys; dresses, tees, sweatshirts, leggings, plus vintage denim for ladies. Everything’s marked $15-$90. Why: Get out of your sophomore slump. When: Thurs., noon-9 p.m. Where: Circa Now, 238 E. 6th St., b/t Second Ave. & Bowery (212-254-2555). La Perla What: Lingerie, sleepwear, swimsuits, and men’s undies are 75 percent off. Why: Sleep it off. When: Thurs., 9 a.m.-8 p.m.; Fri., 9 a.m.-6 p.m. Where: 260 Fifth Ave., b/t 28th & 29th Sts. PREORDER Tickets to DailyCandy’s Midnight Music & Munchies What: Fave foodies riff on late-night snacks, mix mean cocktails, and make sweet sounds during the first-ever NYC Wine and Food Festival. Why: Sure, you’re planning really far ahead, but everybody likes an after-party. When: Oct. 10. Fri, 10 p.m. Where: Tickets on sale here. DRINK Blue Angel Wines What: Two enterprising ladies (one an Astor wine alum) with wicked booze knowledge open a mostly organic (yet reasonably priced) wine shop in the BK. Why: Thank the divine messengers. When: Mon.-Wed., noon-9 p.m.; Thurs.-Sat., noon-10 p.m.; Sun., noon-6 p.m. Where: 638 Grand St., b/t Leonard & Manhattan Aves., B’Burg (718-388-2210).