What is the big room at Carlsbad Caverns?
The big room is the largest single underground Chamber in the world. It is about 2,000 feet long and an average of 600 feet wide, an average 200 feet high, and covers an area of 12 to 14 acres. The people in this picture are on on one of the regular tours. The largest number of people to tour the caverns in one day was over 7,500.