3St. Peter’s Basilica

St. Peter’s Basilica is the largest church in the world and a major pilgrimage site for Catholics.

Located in Vatican City, it attracts visitors not only for religious reasons but also for its incredible art and architecture. The dome, designed by Michelangelo, offers panoramic views of Rome, but expect long lines to enter the basilica, especially during weekends or religious holidays.
Even though it’s free to enter, the sheer number of visitors makes it one of the busiest spots in the city.