The Montby castle was built in the Middle-Ages on a fortified hill and overlooks the Vallée du Doubs and the Chaîne du Lomont.
It is in renovation for several years and is listed by the Fine Arts Academy since 2009.
The oldest walls are a meter eighty wide and protected the inhabitants of the neighborhood during the invasions. It was sold as "national property" in 1795 and became a farmhouse. The eastern part was destroyed during the battle of 1870 and never reconstructed.
In July during the second week-end and even-numbered years, the "Fête Médiévale" animation takes place here on Saturday from 2 pm to 7 pm and Sunday from 10 am to 6 pm.
The association "Les amis de Montby" proposes visits all year long by appointment.
In September the association welcomes you the 3rd Sunday of the month for the European Heritage Days.