Nakorn Kasem is the Thieves Market of Bangkok. Today it is more likely to be called the Flea Market, to remove any illicit connotation from the name, but certainly, in the past, stolen items ended up here.
Nakorn Kasem is located along Charoen Krung Road within Bangkok's Chinatown. This is the place to look for bric-bracs from old music records to metal wares to all forms of ornaments.
How to reach Nakorn Kasem
Either take a taxi there, or take the Bangkok Metro subway to the Hualamphong Subway Station, and then walk from there (it's quite a distance to walk though). Walk west along Charoen Krung Road until you arrive at Nakorn Kasem.