Natural Bridge Caverns in Texas has unveiled a new multi-million-dollar cavern tour experience, complete with a new light show, bridge, and moving belt walkway. After years of development and millions of dollars invested, Natural Bridge Caverns will open its latest tour: Hidden Wonders. Already Texas’ largest and most visited commercial cave, this new multi-million-dollar tour experience features specialty lighting, a new sound and light show, and expansion into never-before-toured areas of the property’s Hidden Cavern.