Most travellers give Bologna two nights, eat extremely well, walk a few kilometres of portico and move on to Florence. That is a reasonable itinerary and a wasted opportunity, because the city's strongest argument is not gastronomic but geographical. Keep one room here for a week and you can still wake up somewhere different every morning, with no second hotel booking and no car.
The regional shorthand is a ribbon of towns strung along a single Roman road. The Via Emilia does run more or less straight from Rimini to Piacenza by way of Imola, Faenza, Forlì, Cesena, Bologna, Modena, Reggio Emilia and Parma, and several of the trips below sit on it. But the two we rate most highly do not. Ferrara is some 45 kilometres north of the road, out on the Po plain; Ravenna lies off to the east, on the flat ground behind the Adriatic. Bologna earns its keep as a base not because it sits in the middle of one line, but because it is the junction where that Roman road crosses the routes running north towards Ferrara, Padua and Venice and east towards Ravenna and the coast.
What follows is about the ring rather than the city: what is genuinely in reach, how long each place takes, which deserve a full day, which are a half, and how to sequence a week so you are not standing on a platform at the wrong hour.
Where the lines actually go
Bologna Centrale is where the Milan to Rome high-speed line meets the older routes east to the Adriatic and north into the Po plain, and the practical consequence is that several regional corridors leave the same concourse throughout the day. In round numbers, on regional services rather than the fast trains: Modena is roughly twenty to thirty-five minutes; Ferrara about half an hour on the quicker workings and nearer fifty on the stoppers; Faenza roughly forty minutes to an hour; Parma about an hour to an hour and a quarter; Ravenna an hour to an hour and twenty.
Rimini is the one people misjudge. Ordinary regional trains commonly take an hour and twenty to an hour and three-quarters, and only the fastest Regionale Veloce or a booked high-speed service comes near the hour, so do not file it mentally alongside Faenza. Florence, through the Apennine tunnels, is around thirty-five to forty minutes on the high-speed line, which is less than some Bolognese spend getting to work.
Two points about tickets. Regional fares in Emilia-Romagna are banded by distance, so Bologna to Modena and Bologna to Ravenna are nowhere near the same money. What they are not is yield-managed: the price does not climb as the date approaches, there is no seat reservation, and the ticket buys travel between two named points rather than a place on a particular train. That is the flexibility high-speed travel does not give you. Decide over breakfast, board whatever is next. Buy singles rather than hunting for a regional tourist pass; if a promotion is offered at the counter, weigh it against the number of journeys you will actually make.
The station is fifteen to twenty minutes on foot from the centre, much of it sheltered, and there is usually a left-luggage office if your arrival and departure days are awkward. The airport is linked to the station by the Marconi Express, an elevated people mover; the ride typically takes under ten minutes, and it costs considerably more than a city bus ticket, so check the current fare rather than trusting a figure in an article.
The half-hour ring: Modena and Ferrara
Modena rewards a specific order. Go early and start at Mercato Albinelli, the covered market in its inter-war iron-and-glass hall, because markets here are a morning proposition and generally wind down by early afternoon. Then Piazza Grande, the Duomo and the leaning Ghirlandina bell tower, which UNESCO lists together as one site. The Galleria Estense, in the Palazzo dei Musei, holds the collection the Este dukes brought with them when they lost Ferrara, and it is a serious two hours rather than a quick look.
Now the day forks, and the honest advice is not to fight it. There are two Ferrari museums: the Museo Enzo Ferrari in Modena, built around the house where Enzo Ferrari was born and roofed with a great yellow aluminium shell, and the Museo Ferrari at Maranello, some eighteen kilometres south. A shuttle bus links the two sites and a combined ticket covering both is usually sold, but confirm the departure point, the frequency and how long the ticket stays valid on the museums' own channel before you build an afternoon around it. The round trip plus two collections is a half-day at the very least. A morning of market, piazza and cathedral followed by the Galleria Estense is a full day; so is a morning in town followed by the cars. Attempting all of it is the sort of plan that ends with a taxi fare from Maranello you will resent. Balsamic acetaie sit in the hills outside town and generally need booking and transport: a lovely half-day, a poor improvisation.
Ferrara is flat, quiet and organised around bicycles, so hire one near the station. Roughly nine kilometres of Renaissance brick walls survive, reduced from a longer original circuit, with a green path along the top that is the standard ride. Do not expect an unbroken car-free lap. Continuity was interrupted in the southern sector by a papal fortress built in the early seventeenth century, and the path is crossed by public roads at the city gates, so ride it as a sequence of long green stretches instead.
Inside the walls the Este city is unusually legible. The moated Castello Estense sits in the middle, the medieval tangle of Via delle Volte to the south, and Biagio Rossetti's grid of the Addizione Erculea to the north, with the diamond-point facade of Palazzo dei Diamanti at the hinge. Two interiors justify the trip on their own: the Salone dei Mesi at Palazzo Schifanoia, frescoed by Francesco del Cossa and his circle, and MEIS, the national museum of Italian Judaism and the Shoah, in a former prison. The cathedral facade has spent years under restoration; check its current state before planning a photograph around it. Note also that the Castello typically closes on Tuesdays rather than Mondays, so confirm the day before you fix it.