sentences:  After a failed search for gold, he opened the caverns to travelers and began charging 25 cents admission, which included a view of a purported caveman.In the 1960s the "caveman" was shown to be the remains of two inhabitants of the area, who had died in the winter of 1917–1918.Part of a group of Hualapai Native Americans harvesting and cutting firewood on the caverns' hilltop, they were trapped there for three days by a snowstorm.