Rishi Cave (Tham Ruesi) is a small cave located near the path leading up to pay respects to Phra Phutthachai at Wat Phra Phutthachai in Saraburi, characterized by its tranquil atmosphere where ascetics and hermits are believed to have practiced meditation since ancient times. The surrounding area of the cave features prehistoric rock paintings, including depictions of chickens and ancient symbols dating back approximately 3,000 years, reflecting the settlements and rituals of humans in antiquity. The cave's simplicity, combined with its historical and spiritual narratives, makes it a fascinating stop for visitors seeking to experience the mystery and deep-seated faith rooted in the Khao Pathawi area.