Marble Caves, Chile Six thousand years of wave erosion created the undulating patterns that give these caves their marbleized effect, enhanced by the reflection of the blue and green water of Carrera Lake, near Chile’s border with Argentina. Although the area is threatened by a plan to build a dam nearby, for now, visitors can kayak throughout the caves on days when the waters are calm.
The 7 Natural Wonders of the World -- "These incredible places, some of Mother Nature's best offerings, will inspire and amaze you." Each of the seven includes pertinent facts and information about it. Nice for discussions.