It's minus ten degrees in Iceland, but Ainsley discovers street food galore, from lobster soup to ceviche, cake baked in a geyser, and lamb smoked in dung.
In Taipei, Taiwan's capital city and one of the greatest food destinations in the world, Ainsley finds braised fish, chilli pork stir fry, steaming noodles, grilled dumplings and crispy duck.
In Sicily, Ainsley enters street food heaven with stuffed sardines, fresh tuna, arancini and fried calamari. He also meets the city's anti-mafia foodie mayor.
In the city known as Japan's kitchen, Ainsley tries oyster tempura, udon noodles, chilli prawns - and even raw chicken - surely the most dangerous food in the world?
Ainsley has slow-cooked pork, calamari braised in red wine, and deep fried artichoke hearts in Madrid. There's also garlicky prawns, and sardines and wine - for breakfast.
Ainsley is on the final leg of his Street Food journey in Amman in Jordan, where recipes include a secret Bedouin method of slow-cooking whole spiced lamb.