Sacri Monti of Piedmont and Lombardy by Joel on the Road
My wife and I visited two of the Sacri Monti in September 2017. Staying near Lake Como, we decided to visit first Varese and secondly Ossuccio. Unfortunately we found the site at Varese to be a total disappointment, since you can basically drive to the top and it's just a confused jumble of uninspired buildings.
Ossuccio, however, was the total opposite. You have to park near the base of the mountain and do a long walk up the path, beside all of the chapels before reaching the top with its impressive Baroque sanctuary and incredible views back over Lake Como. It gives you a really great understanding of what the Sacri Monti concept was all about, and why it was so important to Italians of the time. I'd strongly recommend prioritising a visit to Ossuccio if you want an authentic Sacri Monti experience.