Hall of Giants, Carlsbad Caves, New Mexico: In Sequoia Caverns, stalactites protected from tourists from grew 10 inches, or 1 inch per year. At this rate they could have grown 300 ft in just 3600 years.
Texas is blessed with some of the nations most interesting "show" caves and thousands of "wild" caves throughout the state. Because of the varying geographical regions and features of Texas, you could literally tour the entire state by jumping from cave
New Mexico. Located in the Guadalupe Mountains in southeastern N., Carlsbad Caverns hide beauty and wonder deep underground. Beneath the rugged land are more than 119 known caves — all formed when sulfuric acid dissolved the surrounding limestone.