Great food can make a holiday, here’s a selection of mouth-watering trips, from the simplest crab shack to a marathon gourmet tour. Guardian experts on where to find the best examples of 10 classic dishes

1. The best sushi in Tokyo
Heston Blumenthal, chef
Tsukiji fish market in Tokyo blows my mind— 700,000 tonnes of fresh fish is traded there every year. The place is immense and bursting with life— ocean and human. Go there at 5am for the tuna auction; the reverence the Japanese show for fish - for all foods in fact— is stunning and humbling. Even the way they wrap fish is more beautiful than you'd find in any posh food hall. I love it and feel like a kid in a sweet shop (alright, an umami shop). After a good mooch, I join the queue at Daiwa Sushi for the best sushi breakfast you'll ever eat. Sushi Dai next door is also amazing. 

2. The best pizza in Naples
Davide Paolini, Italian culinary writer
The margherita at L'Antica Pizzeria Da Michele's combines all the true characteristics of the ideal pizza: a slightly singed crust which rises the width of a finger from the plate, good oil, sweet tomato and cow's milk mozzarella - not buffalo mozzarella, which contains too much milk and makes the pizza soggy.
There's no wine, just beer. People in Naples eat pizza fast, so the wait's never too long. You get margherita, which is the true pizza, or marinara (tomato, oregano and garlic). That's it, and that's all you need.

3. The best burger in New York
Joshua Stein, restaurant reviewer
Ask a New Yorker for the "best burger" and they are liable to laugh derisively. "That's impossible," they'll reply. "Do you mean old school or new school, retro or nouveau?" Old school burgers - pure ground beef, a slice of American or cheddar, lettuce and tomato on a sesame bun - is a completely different creature from the new school variety, almost invariably served on a brioche bun with some obscure cheese and creative seasoning mixed in with the chuck. You want old-school you head to Royale.

4. Best steak frîtes in Paris
François Simon, food critic for Le Figaro
A lot of restaurants in Paris serve great steak frîtes, but the most authentic, for my money, is Le Bistrot Paul Bert in the Bastille. The prices are reasonable and there is a warm, cheerful atmosphere - a good steak frîtes needs to be served among locals, not tourists or rich diners. Here, there are lots of people talking happily, decent assiettes and fantastic meat; the filet de boeuf comes from Normandy and is served in 250gr steaks.

5. The best seafood in Sydney
Bill Granger, chef and restaurateur
Often the essence of a city lurks in the little backstreets and quieter neighbourhoods, although the glamour and accolades go to the harbour and beachfront restaurants. Fish Face is a tiny gem of a restaurant, just around the corner from my first Bill's restaurant. The decor is unfussy with bar stools and small round tables, which are always busy.

6. The best pho in Vietnam
Graham Holliday, food blogger from noodlepie.com.
There's still a north-south divide in Vietnam: Hanoians in the north of the country think their aromatic beef noodle soup, pho, is the best. But 1,200 miles south eight million plus Saigonese disagree. And there's a very good reason for this. Ho Chi Minh pho is better. Not just better, but leagues, streets above anything you'll find in Hanoi.

7. The best oysters in Ireland
Anne Kennedy, managing editor of Greatfood
The tourist ads like to show the Irish in pubs across the land drinking pints of creamy Guinness, slipping oysters down their throat before lapsing into rhapsodic story-telling of a Joycean nature. In truth, it has taken the Shelbourne to bring oysters back on the menu as a regular item in the city. People who never used to eat them can now be found in the Saddle Room restaurant testing the waters for new combinations.

8. The best juice in Rio
Claude Troisgros, chef at Rio restaurants Olympe and 66 Bistro
There are juice bars in every town in Brazil, but in body-beautiful, calorie-counting Rio they are especially revered, and found on nearly every street corner. Choose your own combination of tropical fruits from the dozens on display, making sure they use fresh fruit rather than pulpa, and ask for your juice sem açúcar or pouco açúcar - "without sugar" or "little sugar". Two of the best places are BB Lanches and Natural e Sabor Juice Bar - both are near the beach and serve fantastic açai, the Amazon super fruit.

9. The best dumplings in Eastern Europe
Martin Blunos, chef
Piragi are a Latvian classic. It's food in its own wrapping, like a pattie or a pasty, so a peasant in a field could have carried it in a hankerchief; soft bread dough with a range of fillings, from sauerkraut to bacon. They're one of those dishes that every country thinks it invented, so in Russia they're called piroski, in Poland pierogi, but the best place to eat them is at Vincent's in Riga, a modern restaurant favoured by heads of state, which does a classic version.

10. The best tandoori in Delhi
Anjum Anand, chef and food writer
Tandoori is originally from northwest India, but Delhi is now its main hub.
Bukhara (0091 11 2611 2233, sheraton.com/maurya) in the Sheraton hotel is known for its mastery of tandoori food - don't go there looking for a curry. The tandoori leg of lamb is fantastic, the chicken tikka is smooth and subtly spiced and you should order the black makhni dal, a creamy mass flavoured with tomatoes, garam masala, lots of butter and cream.