Porvoo is best explored on foot: the pedestrianized Old Town is compact and all main attractions can be easily reached from the bus, ferry or train stations. Parents will, however, probably want to leave the baby carriage at home: the Old Town's streets are cobblestone and often hilly.
There used to be horse and carriage service, but it was shut down in 2010 due to financial problems. The Museum Railways also operate occasional steam train excursions.
