Surrounded entirely by the city of Rome, Vatican City is the world’s smallest country. A Vatican guided tour is one of the best ways to get an overview of this small but fascinating 110 acre country. Although some areas of the Holy See are off limits to the public, there is still plenty to see here, including the Vatican Museum, with its priceless art treasures, as well as the historic Sistine Chapel, with its ceiling painted by Michelangelo. Most tours also take in St. Peter’s Cathedral, the spiritual heart of the Catholic Church, and one of the world’s largest churches. Although you can visit the Vatican yourself, a guided tour lets you benefit from the guide’s knowledge and insight, and it also means you can skip the long lines that are an inevitable part of visiting one of Europe’s most fascinating and secretive destinations.