Brooklyn Flea

Started as a quaint neighborhood bazaar, the Brooklyn Flea (it launched in 2008) is a sprawling market that takes place in Fort Greene in the summer months and inside the gorgeous One Hanson Place bank building the winter (there's also a smaller spin-off in Williamsburg in Sundays). Judging from the prices, it's more estate and high-end vintage than flea, but it's a great spot for local mementos and cool finds (there are about 150 vendors, from antique furniture dealers to jewelers) and people watching. Location varies.