While the euro is used in many European nations, not all have adopted it. Countries like Hungary, Poland, Denmark, and Switzerland use their own currencies.
What to do instead: Do your research in advance to find out what currency is used in each country you plan to visit, and plan accordingly. Apps like XE Currency are great for real-time conversion rates.
Earthology365 rounds up 10 of the most historic villages around the world that still are not only livable but happen to be stunningly beautiful as well.