Its name literally meaning "see the weight" (a throwback to the time when the Portuguese weighed everything entering or leaving the region), this market is a hypnotic confusion of colors and voices. Vendors hawk tropical fruits, regional wares, and an assortment of tourist kitsch. Most interesting are the mandingueiras, women who claim they can solve any problem with "miracle" jungle roots and charms for the body and soul. They sell jars filled with animal eyes, tails, and even heads, as well as herbs, each with its own legendary power. The sex organs of the pink river dolphin are a supposedly unrivaled cure for romantic problems. In the fish market you get an up-close look at pirarucu, the Amazon's most colorful fish and the world's second-largest freshwater species. Look for bizarre armored catfish species, such as the tamuatá and the huge piraiba. Across the street is a small arched entrance to the municipal meat market. Duck in and glance at the French-style pink-and-green-painted ironwork, imported from Britain. Be sure to visit Ver-o-Peso before noon, when most vendors leave. It opens around 6 am. Leave your jewelry at home and beware of pickpockets.