GRAND CANYON NATIONAL PARK
Was this man made?
Do you light it up at night?
I bought tickets for the elevator to the bottom; where is it?
Is the mule train air-conditioned?
So where are the faces of the presidents?

DENALI NATIONAL PARK
What time do you feed the bears?
Can you show me where the yeti lives?
How often do you mow the tundra?
How much does Mount McKinley weigh?

CARLSBAD CAVERNS NATIONAL PARK
How much of the cave is underground?
So what's in the unexplored part of the cave?
How many ping-pong balls would it take to fill this up?
So what is this -- just a hole in the ground?