Rancho Palos Verdes, Los Angeles County
A slow-moving landslide at Portuguese Bend has been carrying part of Rancho Palos Verdes toward the sea since 1956, and the road across it is repaved again and again as the ground shifts. Around the slide area, the Palos Verdes Nature Preserve protects about 1,400 acres of coastal sage hills, with trails that drop to tide pools at Abalone Cove.