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In the spring of 1963, a core drilling team spotted Inner Space Cavern and professionals determined a six-inch core sample. As they drilled a test hole, the drill suddenly dropped 26 feet. This wonderful discovery news spread quickly in the next few months, learned to get Texas cave into and explore new found that permits the dark cave. In the next few days, they carried on the survey to 7000 feet in the cave, the channel from very narrow crawling to large room and hall awesome cathedral. In most cases, the cave is very easy to go, in addition to some narrow tunnel and all places with viscous mud all over the cave. In the summer of six years, Inner Space Cavern was opened to the public,and since then, thousands of tourists have seen this beautiful cave.