One of my favorite travel memories is from Italy in 2016. I was with three lovely friends (two of whom lived in Italy) and we were in Pisa on the 16th of June, which is the Luminara. This is a festival to celebrate San Ranieri, and the whole city lights up.
Workers start around midday hanging and lighting candles over all the buildings along the river Arno. At 11 pm, a spectacular firework show with music starts and carries on for an hour. The streets are flooded with people and in every Piazza (city square) there are people eating, drinking, and dancing.
The party goes on to the early hours of the morning! The following morning, we got a train to Rome where I then had the best carbonara ever, which I still speak of to this day. For those interested, the restaurant is called La Carbonara, in Rome.