I love visiting markets while travelling any city, town or even the smallest village.
First of all, it is a great place to observe a part of local economy - what grows in the region, what people eat in the region, what is created here and what is valued here, what is demanded and supplied and what is bought and sold.
Secondly, it is a great place to understand a part of local culture - how people buy, how people talk to each other, how people bargain and how people fight. You can observe all kinds of people here - who live in the city and who are visitors in the city.
This is why the post on markets, alias Bazaars!
The pictures here are just a representative of amazing things and amazing people I found in one of the oldest markets of London, in a UNESCO world heritage site - the Greenwich market.