"This gothic cathedral in the heart of Reims is more than 800 year old, and was badly damaged during WWI. In fact, 80 percent of the city was razed around it, so it's no small feat that it still stands today (with the help of perpetual periods of renovation). It was once where the kings of France were crowned, and it was one of the first monuments listed as a UNESCO World Heritage Site. Tickets are required ($9), but can be purchased upon arrival. A visit inside is crucial to really getting a sense of its grandeur, as well as the history of Reims." - Lindsey Tramuta, Mary Winston Nicklin