Feeling a bit cramped?

On a family vacation several years ago, I learned what claustrophobia was all about.

We arrived at Lewis and Clark Cavern State Park in Montana and all of the family made it into the opening for the then self-guided tour. That’s when our youngest daughter, Kim, said she wouldn’t go through the underground cavern. She said that she couldn’t handle being in cramped spaces.

So she got back out of the...