Zurich, Switzerland, is the most expensive place on Earth for tourists, according to research by airport transfer company Hoppa.
And the cheapest of 84 cities rated is Sofia in Bulgaria. The survey threw up quite a few surprises.
After their hotel stays, many guests receive an online survey asking them to rate the service and facilities.
I have a problem with these surveys — they are often too detailed, too long and too time-consuming; they often demand answers to questions that are irrelevant to the respondent; and they require some of us to think in ways we may not normally think.
