Anthony Bourdain's Parts Unknown is back, and the next episode of Season 7 takes the host to Chicago. But instead of chowing down on deep-dish pizza and hot dogs dragged through the garden, he visits the Windy City's Chinatown in this preview. Bourdain confesses he didn't realize quality Szechuan fare could be found in Chicago.

"Look, I knew Chicago was a city of very diverse neighborhoods — everybody says so," Bourdain explains in the clip. "But this, I didn't know about. Now I do."

Bourdain dines with Stephanie Izard, who recently opened her own Chinese restaurant Duck Duck Goat, and her colleague Peter Wong. Izard believes getting out into those diverse neighborhoods is the best way to approach the city. "Well I think a lot of people come and they think that Chicago is, like, on the Magnificent Mile," she says. "They're like, 'Oh, should we go down to Navy Pier?' And I'm like, 'No!'"

In a second clip, seen below, Bourdain heads to the famous Second City, where he learns the history of Chicago's comedy scene. Parts Unknown: Chicago airs this Sunday at 9 p.m. ET on CNN.