In the small showcase-museum inside the church, a number of sacred art objects are displayed, including a chasuble from the 17th century that belonged to the La Lechère chapel. It was a gift from the Archbishop of Paris, Monsignor Leclerc de Juigné, who fled his diocese during the French Revolution and crossed the Col Collon to take refuge in Bionaz.
Also inside the parish church, you can admire the statue of Saint Margaret sculpted by local sculptor Ettore Bionaz.
Five votive chapels can be visited within the parish territory of Bionaz. The chapel of Chentre, built in 1641, whose patron saint is "Saint-Roch", celebrated on 16th August. The "La Serva" chapel, located in the hamlet of Rey. Built in 1710, then renovated in 1958, it is dedicated to Our Lady of the Snows (5th August). The chapel of Pouillaye, the chapel of La Lechère, dedicated to "Saint-Roch" and Saint Barbara (16th August), also restored in 1998.
Behind the parish church of Saint Margaret there is still an old stone building called the "Batise". This structure, built in 1795, was restored by the current owner, the Bionaz municipality, thanks to a contribution obtained with the "Jubilee of 2000" and with its own funds, and today serves as a modern youth hostel.