The heritage zone is small enough to walk end to end in twenty minutes, and on foot is the best way to explore it. Calle Crisologo and the surrounding streets of the UNESCO zone are compact, and most of the significant sights are within easy walking distance of each other or of the main plazas.
Kalesas — horse-drawn two-wheeled carriages — are both a tourist attraction and a functional mode of transport in Vigan, and taking one is a legitimate way to get around rather than just a photo opportunity. They are available along Calle Crisologo and around the plazas; agree on a fare before you set off. A kalesa can take you to the outlying sites like Bantay Bell Tower, which is a slightly inconvenient walk but a short and pleasant ride.
Tricycles (motorcycle-and-sidecar combinations) handle longer distances within the town and to the pottery village at Pagburnayan or other spots outside the heritage zone. They are cheap, plentiful, and the drivers know where everything is.
The heritage zone itself restricts motor vehicles during much of the day, which is part of what makes walking so pleasant. If you arrive by bus, the terminal is a short tricycle ride from the heritage zone centre.