Reserve the morning of your last day in Vallès Oriental to discover Sant Pere de Vilamajor. Explore the historic town centre, La Força, declared a National Heritage Site, and the old fortified quarter around Vilamajor Castle. What's left of the castle – which was once home of the Counts of Barcelona when they were passing through and where King Alfons I of Catalonia (son of Petronila of Aragón and the Count Ramón Berenguer IV) is believed to have been born – is known as the Red Tower, converted into the bell tower of the adjacent Sant Pere church. There, you'll find the Information Centre La Mongia, where you might want to be informed about what not to miss in the historic centre. For example, the well-preserved walls and moats, or Can Vila, the old defensive castle tower, or the so-called Black Tower or Torreta, the highest point in the church grounds.
Jumping forward a few years, but not straying too far, is La Vicaria, a farmhouse from the year 1639, which is now an artist residence, where many artists have passed through. In the esplanade in front, you'll find various works of modern art.
In the afternoon, head to Santa Maria de Palautordera. Montseny has always been well-known for the richness of its vegetation, for its collage of landscapes that range from Mediterranean to Central European. So what better place to set up an arboretum than at the foothills of this massif? Containing over 80 different tree species, all of which can be found in Montseny, this place is perfect for the whole family, and includes picnic areas, a playground and a duck pond.
If you still have some time left on your the trip, we recommend a visit around Santa Maria de Palautordera's heritage sites. Start with the church, a gothic building with a bell tower, which was originally the tower of a 13th-century castle. Walk along Carrer Major and on to Passeig del Remei where you'll come across a selection of modernisme houses. At the top, the neoclassical Remei shrine awaits, next to what was once the Sant Sebastià chapel, today a privately owned home. Other interesting buildings dotted around the town include summer mansions, farmhouses, and the curiously broken bridge that crosses the Tordera river, half in Santa Maria de Palautordera (which preserves its original shape), and the other half in Sant Celoni (rebuilt in 2005 in a modern style) – a great place to say farewell to Montseny.