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.
The largest is Samosir, on Sumatra, followed by Glover Island, on Newfoundland.
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.