Normally we don’t visit lighthouses that aren’t near the shore. Decommissioned is okay, but inland takes away the fun. However the Three Sisters in Eastham are different. First, they’re a short walk from the Nauset Light. Second, their history is demonstrative of a lot of lighthouse history. They were the original lighthouse of Eastham, but were replaced by the current well-known lighthouse. All of the lighthouses were moved back from the cliffs due to erosion. And rather than destroy the Sisters when no longer needed, they were saved for alternative use and later for posterity.
On a side note, I visited the Three Sisters in Australia a number of years ago.
Here’s the story of the Three Sisters of Eastham:
And here are the Sisters themselves: