"10 Divinely Designed Churches"

The Sanctuary of Our Lady of Las Lajas, or the Las Lajas Cathedral [wiki] in Colombia, was built in 1916 on a site where, according to local legend, the Virgin Mary appeared. The story goes like this: an Indian woman named María Mueses de Quiñones was carrying her deaf-mute daughter Rosa on her back near Las Lajas ("The Rocks"). Weary of the climb, the María sat down on a rock when Rosa spoke (for the first time) about an apparition in a cave.

Later on, a mysterious painting of the Virgin Mary carrying a baby was discovered on the wall of the cave. Supposedly, studies of the painting showed no proof of paint or pigments on the rock - instead, when a core sample was taken, it was found that the colors were impregnated in the rock itself to a depth of several feet. Via: Neatorama