A reader comments:
Here’s a recursive island story, probably not unique. When I was 13, I went to a Sea Scout camp on Manitoulin Island in Lake Huron, Ontario. We wilderness camped there for 2 weeks, and one day, we climbed a steep hill/mountain behind our camp, to find a lake, which was quite warm, and good for swimming. Darned if there wasn’t an island in that lake. I looked around for a body of water on the island, but no luck. Perhaps in a torrential downfall… Do you know of many examples of this?
Manitoulin has several nice double islands, relatively large for a lake island.
Their are several thousand such recursive islands in the world, concentrated in Canada, the British Isles, Scandinavia, and a few other places.
Glover is one of the few places in the world where there are islands on an island on an island — triple islands. I once spent a week there, and camped on a small triple in the center of the island, alone except for the seagulls, and moose that came to feed at the edge of the lake. It is possible that I am the only person to have slept on a triple island, as they are all quite out of the way.