The document presents several unique and uncommon churches from around the world. It describes churches that have unusual architectural designs, such as Notre-Dame-du-Haut de Ronchamp which has thick curved walls that let in indirect light. It also mentions churches built in remarkable locations, such as the Cathedral of Our Lady of Las Lajas which was constructed on two arches spanning a river canyon. The document briefly outlines various other churches noted for their grandeur, history, and architectural significance.