Piazza Navona occupies the footprint of the Stadium of Domitian (1st century AD), whose curved northern end is still visible in the piazza's shape. Three fountains occupy the space: Bernini's Fountain of the Four Rivers (1651) at the center, the Fountain of Neptune at the north end, and the Fountain of the Moor at the south. The piazza is car-free and accessible at all hours; the fountains are lit at night. Entry is permanently free.
Best for: Architecture fans, evening strollers, first-time visitors
Duration: 30–45 minutes
Combine this with: Sant'Agnese in Agone (the church facing Bernini's fountain, built by Borromini) — free entry during opening hours. From Piazza Navona, Via del Governo Vecchio (starting from the southwest corner) leads into one of the most intact medieval streets in the historic center.

