Here's one that would probably work best if you teach in a major tourist destination like I do in Barcelona — a Life gallery of How New Yorkers Can Spot a Tourist.
I'd suggest that we could get a neat little lesson out of asking first how people in Barcelona (or wherever) can spot a tourist and then comparing the ideas produced with what is said online. The comments on the Life gallery provide you with text for reading comprehension.
Having the class them produce a list of "10 ways to avoid looking like a tourist" makes for a great follow-up discussion and/or writing task, perhaps to go on a class blog.
Having the learners brainstorm the ideas on an interactive whiteboard always works well for me…