Since Avonlea occupied a little triangular peninsula jutting out into the Gulf of St. Lawrence with water on two sides of it, anybody who went out of it or into it had to pass over that hill road and so run the unseen gauntlet of Mrs. Rachel’s all-seeing eye.
There are no more uses of "peninsula" in the book.
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A heavily fortified demilitarized zone divides the Korean peninsula.
The Moors crossed the Mediterranean into the Iberian peninsula.