Coeur d'Alene's Old Mission State Park (Cataldo Mission)

The story

When Italian Jesuit architect Antonio Ravalli and roughly 300 Coeur d'Alene tribal members broke ground on a bluff above the Coeur d'Alene River in 1850, they had no hardware store, no iron nails, and no brick kilns. Instead, they raised the Mission of the Sacred Heart using mortise-and-tenon framing locked together with whittled wooden pegs. To skin the structural skeleton, they laced willow saplings and wild river grass between heavy timber uprights and slathered the weave in thick river mud—a frontier adaptation of wattle-and-daub construction that produced thick, insulated walls without a single nail.

Step inside the sanctuary and the improvised frontier finishes get even stranger. The blue shade tinting the overhead timber ceiling isn't paint; it is a natural stain made from hand-pressed local huckleberries. To simulate a classical European church on zero budget, Ravalli whittled altar statues out of local wood using a pen-knife and painted them to imitate polished marble. He fashioned chandeliers from recycled tin cans, and pasted Hudson's Bay Company fabric and mailed-in Philadelphia newspapers onto the walls to serve as decorative wallpaper. Though official mission operations shifted west in 1877 and the original parish house burned down in 1887, the nail-free church survived on its four-foot-thick stone foundation set in mud.