
One of the seven wonders of the Irvine Ranch Natural Landmarks, “The Sinks” in the Limestone Canyon Nature Preserve, is a hidden gem in Orange County. A geological formation consisting of layered sandstone cliffs, The Sinks are often referred to as Orange County’s Mini Grand Canyon and have become a popular destination for outdoor enthusiasts and photographers.
The red sandstone cliffs that form The Sinks are eroded in the Sespe Formation, a geological formation of southern California which is between 20-40 million years old. Visitors to The Sinks will experience the beautiful reddish-brown sandstone that drops off sharply into the canyon forming a natural bowl.