The castle of Tourbillon on the hill opposite Valere basilica was built at the turn o the 13th and 14th century by bishop Boniface de Challant, a native of Savoy, who made it his principal residence. It is a short walk up a hill from the town of Sion to visit the two castles sitting on opposite hills form each other. The castle unfortunately was ruined during a great fire, that also destroyed part of the town of Sion in 1788. However, there is still a small chapel at the center of the castle ruins that is well preserved. However, the chapel is locked and you can only gain entrance with a tour or guide. Thankfully, on the day my group of friends went, I happened upon the volunteer guide ending his tour with a couple of visitors. He was kind enough to take me on a personal tour of the chapel and up into one of the remaining towers. It would have been an impressive place at one time, if it wasn't mostly destroyed. read more