Mucho Mundo Chocolate Museum is at Calle Milán #45 (at the corner of Av. Roma), near the Zona Rosa in Colonia Juárez (M: Cuauhtémoc, line 1). Chocolate was one of Mexico's greatest gifts to the culinary world, and this small museum explains, through photos and interactive exhibits, the history of the cacao tree and the process of making chocolate from the beans within the tree's pods. Be sure to enter the room that is lined top to bottom with chocolate disks; close the door and inhale the aroma. There's also chocolate art and a café where you can order house-made chocolate concoctions.