Pennsylvania's Largest Cave and Underground Wonderland
Philadelphia, PA - If you want to experience the underground realm of a Pennsylvania cave, you've come to the right place. Laurel Caverns is the state's largest cave, filled with underground watercourses and dendritic passages. The upper cavern entrance consists of interconnected, grid-like passages. The lower cavern entrance features subterranean watercourses and a dendritic system of passages.