In April 2006 we visited the Jesuit Missions of Bolivia. We used the services of a tour agency called Ruta Verde (rutaverdebolivia.com). They have an office in Santa Cruz. The tour was perfect. The churches were beautiful, the guide had a lot of knowledge, the hotels were great. We did a 4 day tour and visisted 6 Jesuit Missions. I really recommend to every one doing the same!