Sentence:  The San Juan <WSD>market</WSD> is Mexico City's most famous deli of exotic meats, where an adventurous shopper can hunt down hard-to-find critters such as ostrich, wild boar and crocodile. Only the city zoo offers greater species diversity. 
Meaning of the word marked with <WSD> tags:  City square or other fairly spacious site where traders set up stalls and buyers browse the merchandise.