Natural Bridge Caverns, TX – 09 NOV 2011

A group from work went to check out the nearby Natural Bridge Caverns (San Antonio), the largest known commercial caverns in the state of Texas.
 Tinky Winky takes a ride in the parking lot
Discovered March 27, 1960 by four college students from St. Mary’s University, who talked Mrs. Clara Wuest into letting them explore the sinkhole on her property…it is still owed and operated by her decedents.
My surprise was the temperature of 70 degrees with 90+ percent humidity…it was like walking through a sauna.
They have two world class caves to explore.  
Straws
We took the Hidden Passages Tour first which has “light and darkness combine to enhance your exploration of huge underground chambers decorated with some of our most rare and delicate formations.”
“The Hidden Passages are highly decorated with unusually long 'soda straw' stalactites, waves of 'cave ribbon' and a profusion of intriguing 'welt and turnip shields.' Another unique experience only offered on this tour occurs when all the lights are turned off and you experience total darkness.”
After the first tour TW finds some friends in the gift shop:
Next we took the Discovery Tour which covers a half-mile of the “largest and most spectacular show cavern in Texas.” 
Part of the sink hole
The only living thing in the caverns today:
“The Hidden Passages are highly decorated with unusually long 'soda straw' stalactites, waves of 'cave ribbon' and a profusion of intriguing 'welt and turnip shields.' Another unique experience only offered on this tour occurs when all the lights are turned off and you experience total darkness.”
Walking 180 feet below the ground, our tour guide educated us on the history of the caverns and the formations. 
And we did “See awe-inspiring, ancient formations centuries in the making and still growing today, such as amazing stalagmites, stalactites, flowstones, chandeliers and soda straws.”
Here’s a link to all the photos:  http://youtu.be/kQu_85kFhs4
Near the end of the Discovery Tour they take your photo to sell you after the tour. 
I had Tinky Winky take this shot...I think he did a better job.