Lying under a hill of limestone, said by geologists to have been the bottom of a tropical sea 500 million years ago, the Caves present a weird and entrancing sight. Stalactites, or rock icicles formed at the rate of one cubic inch in 150 years, hang from the ceiling and the handiwork of nature is enhanced by electric lights. Visitors can take tours through the caves and view fossils of coral and aquatic creatures embedded in the cave walls.