
In the southern portion of OC Parks’ Limestone Canyon Nature Preserve sits “The Sinks,” a striking geological formation consisting of dramatically exposed and layered sandstone cliffs. The raised viewing platform that overlooks an impressive view of The Sinks has become a popular destination for explorers of the Irvine Ranch Natural Landmarks. While the beauty of The Sinks is instantly understood by all who visit, the history of the formation is millions of years in the making