HOLE-y Moley

On one of our many hikes along the Boise River, Len and I came across this rock. What caught our attention is the perfectly round hole in it:

After continuing on our merry way, we tried to one-up each other on the different types of holes there are. Our list includes:

Loophole, donut hole, drainage hole, keyhole, watering hole, black hole, gopher hole, post hole, sinkhole, pothole, a hidey-hole, bullet hole, and then, of course, there’s the a$$hole—which made us both laugh like dorky junior high kids.

What can you add to the list of holes?

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