[davidcalloway]

Many years ago I visited some lava tube caves in Hawaii. I had to call and get directions, write them down and follow them... No address I could out into a navigation device, no coordinates.

It seemed strange and I thought they could surely modernize their operations and get more business.

Nope. The friction was intentional, they told us later. Before visiting the cave you had to prove it was worth it by calling, and that you could follow directions and instructions.

They previously didn't filter customers so well and those people would touch and break sensitive pieces of the cave.