Fodor's Expert Review Diamond Caverns
Formed from limestone millions of years ago, these caves have been a popular local attraction since they were discovered in the mid-19th century. Descend into this series of subterranean galleries, and you'll get up close to enormous stalactites and stalagmites, projecting onyx peaks, and rock palaces. Temperatures in the cave hover around 58°F throughout the year. Visits are by hour-long guided tour.