The Trevi Fountain is Rome’s largest and most celebrated Baroque fountain, filling the entire side of Palazzo Poli where three streets meet, which gives it its name (tre vie). Completed in 1762 to a design by Nicola Salvi, it marks the end of the ancient Aqua Virgo aqueduct and depicts Oceanus riding a shell chariot drawn by sea horses.
It is world-famous for its coin-tossing tradition: toss a coin over your shoulder and legend says you will return to Rome. Around 3,000 euros are gathered each day and donated to charity.
The fountain sits in a compact piazza that grows very crowded by mid-morning, so visit early (before 8am) or late at night, when it is dramatically lit and far quieter. It is a short walk from the Barberini metro station, and 20-30 minutes is enough to take it in.