The Rumor: London is always gray and rainy, and the food is terrible.

The Truth: “In terms of rainfall, it’s actually low on the list,” says Nicole Mitchell, a Weather Channel meteorologist. (The statistics: London gets 23 inches a year, while, on average, supposedly sunny Miami gets a whopping 60 and soggy Seattle gets 39.) “Because London is coastal, it gets drizzly during the winter. But, as with any place, you have to pick the right time to visit,” says Mitchell. (She recommends the summer, when it’s warmer and sunnier.) And as for the local fare, it has come a long way since the days of ubiquitous bangers and mash. “There was a time when English food was, by definition, bad food, but that reputation is about 10 years out of date,” says Tim Zagat, a cofounder of Zagat Survey, a publisher of international restaurant guides. “Now it is one of the best places in the world to eat.” (The turnaround is due in part to the increased availability of fresh ingredients.)

The Rumor: It is rude to make eye contact during conversation in Japan.

The Truth: In the Land of the Rising Sun, do not avert your gaze just yet. “That used to be the rule, back in the old days, during the Meiji and Taisho eras (the late 1800s and early 1900s),” explains Robert Whiting, a Japanese-culture expert and the author of The Samurai Way of Baseball (Grand Central Publishing, $15, www.amazon.com). “It was considered disrespectful, especially when talking to a superior.” These days, however, “people in Japan act just like people in the West. Not making eye contact would be considered a bit odd when talking to someone, even the emperor,” says Whiting.

The Rumor: Venice is sinking.

The Truth: Not so much, says Fabio Carrera, a native of Venice and a professor of urban studies and planning at the Worcester Polytechnic Institute, in Massachusetts. “If by sinking you mean that the land is going under and losing elevation, then, no, that is no longer true,” says Carrera. Once upon a time — from around 1900 up until the 1970s — Venice did dip deeper into the water, by nearly five inches, because the aquifer beneath it was being drained to provide water to the mainland. “When people realized what was happening, they stopped pumping water out, and Venice rebounded by about half an inch,” says Carrera.

Still, the city is not totally out of hot water. Thanks to global warming and rising sea levels, Venice — along with other low-lying locales, like New Orleans — remains vulnerable to flooding. But as long as it stays one step ahead of the problem by incorporating preventive measures, like the underwater floodgates currently being constructed, Venice should be the home of many a piazza (and pigeon) for years to come.