Next to Greynolds Park in North Miami Beach, find the charming coffee shop the Alchemist. Tucked inside a complex of unassuming houses on West Dixie Highway, the quiet retreat sits inside a barn-like structure, where the shop slings fresh-baked Belgian waffles and churns out 24-hour cold brew. Walking toward the entrance, you're greeted by a garden patio lined with trees and filled with intimate tables. Inside, a coffee bar is filled with laboratory-like flasks and beakers holding various teas and coffees. The baristas are called "coffee scientists." You'll spot the shop's syphon, a contraption used to brew coffee in-house. For the cold brew, beans are roasted onsite and cold-steeped for 24 hours. Then the coffee is mixed with brown sugar and sweetened condensed milk for a rich, creamy flavor. It's poured into a giant glass dispenser where it infuses further. Try one for yourself — a barista will hand-shake the brew inside a cocktail shaker and then pour it over fist-size ice cubes in a Mason jar. Order the café's signature menu item: an open-faced sandwich on Tuscan bread ($7.99). Choices range from savory to sweet, including turkey and Swiss, smoked salmon, melted Brie, caprese, and Nutella. Alchemist is open from 8 a.m. to 5 p.m. Monday through Thursday and until 6 p.m. Friday through Sunday.