
- The Sinks – The Sinks is a geologic formation in the southern portion of Limestone Canyon. It consists of dramatically exposed and layered sandstone cliffs. These cliffs are part of the Sespe formation, which scientists believe was formed between 20 - 40 million years ago. Many scientists believe that the exposed cliffs that make up The Sinks were formed as a result of a single landslide event, likely triggered by seismic activity or a large storm event, that occurred within the last million years. Regardless of how it was created, The Sinks is one of the most beautiful and interesting geological formations in Orange County.
- Dripping Springs – Dripping Springs is a year-round spring in the middle of Limestone Canyon that is expressed through the side of a vertical rock face. Famous for its lush ferns and rare wildflowers, Dripping Springs is an extremely sensitive area and an essential watering hole for wildlife in Limestone Canyon.
- Box Springs – Located off of Loma Ridge road east of The Sinks, Box Springs is a year-round oasis for wildlife in the canyon fed by the same water source as Dripping Springs. The shady oak canopy that surrounds Box Springs is a popular spot for wildlife.