This is the big daddy of Amsterdam flea markets.  It’s been around for over 100 years and has  huge variety of new and second hand clothes, books, bric-a-brak, bikes, even porn, well this is Amsterdam after all.  You can get cheesy souvenirs here for less than in the souvenir shops.

It’s open Monday to Saturday about 10h30 to 17h30

http://www.iamsterdam.com/en-GB/Ndtrc/Waterlooplein%20Amsterdam