Due to the strengthening dollar, travel to Europe has become cheaper for Americans to visit. Prague is now the fifth-cheapest major city in Europe for a one-week trip from the United States, and some 11 percent cheaper than last year according to travel website TripAdvisor’s TripIndex. The same travel website also recently named Prague the top destination to visit in the European Union and number five in the world, based on site user reviews of restaurants, hotels and other attractions.