Look for foodstuffs. The population is a hundred times what it usually is, as are the stalls. People shouting and jeering. The smells assault you, as do the sights. It's a maze.
Every street looks the same.
I think it's at least five blocks by five blocks. The regular market has burst onto the street like a university house party. She grabs my hand. We enter a familiar corridor of the market. In the middle of the market, an artificially created urban valley.