A collection of variously sized rocks spreading out to about 1 mile from the shore of Stony Creek, CT. Depending on what you call an "island" (is there a minimum size?) there are over 100 of them, but the consensus number seems to be something like 26. Rocks everywhere, anyone sailing a boat with a keel had better know where they are going!
Easy access from the Town Dock, if you arrive early enough to get a 4-hour parking spot.
Some of the islands are embellished with walls and fill, to make them "buildable"
Some of the houses almost seem bigger than the islands, as if the owners were determined to put something up. "I paid $$$$$$$$ for this island! I'm going to build on it!"
And some go all-out for opulence.
This is Outer Thimble, one of the few uninhabited islands. A sign said "Island Closed", but I stepped off anyway. I head that they give tours, but it wasn't really that big.
Next to Outer Thimble is Horse Island, the biggest Thimble, owned by Yale University. If I had known that, I'd have visited.
Besides these two, its all very developed. You have an interesting geological feature, an archipelago of small islands, not too far from the mainland, and the development rolls in.