Rock House Cave contains prehistoric Native American rock art, mostly pictographs painted on the shelter walls, with faint red images concentrated from the center to the left side and resembling animals, people, sun shapes, geometric shapes, and irregular shapes. Some images, such as a deer head on the center back wall, also incorporate pecked areas and lines, combining pictographs with elements of petroglyphs, which are images pecked into stone. The pictographs were made from mineral pigments mixed with animal fat or eggs, and the minerals bind with the rock to create images that may last thousands of years; red is the most common color, though a few images were made with yellow or black pigments. Archeological digs found artifacts suggesting native people visited the site from approximately 8000 BC to 1600 AD, and the rock art is generally believed to be less than 2000 years old. The images may represent ideas, stories, or visions, but their meanings cannot be known with certainty today.