Todd P.
Yelp
Pigeon Key is a great way to spend a couple of hours learning about the Overseas Railroad that is such an important part of the history of the Keys, Henry Flagler the man who made that history, and the men who worked and gave their lives to make it a reality.
You can walk to Pigeon Key via the original existing portion of the Overseas Railroad, but we went to the "visitors center" in Marathon just before you get on the new Seven Mile Bridge to buy our tickets which included a ferry ride to the island and they pick you up two hours later. All of the brochures talk about a "train" that can take you there, but it was not really a train but rather a tractor and they don't use it any more. The ferry ride is a great part of the experience, giving you an opportunity to see wildlife such as Portuguese Men of War and sea turtles. The ferry's crew were friendly, informative and pleasant, answering all of our touristy questions from how deep is the water to where is a good place for lunch.
The five acre island served as the base camp for building the Overseas Railroad which was completed in 1912 connecting Key West with the mainland by train. Even though miles of track were destroyed in 1935 by a hurricane which put the railroad out of business, the bridges later served as the basis for the original Overseas Highway. The buildings on the island preserve the living quarters used by the workers as well as the men responsible for overseeing the construction and maintaining the bridges, some dating back almost one hundred years. Some are still used for groups to stay in and one of the buildings has been turned into a surprisingly good museum explaining how the railroad was constructed and telling a little about the lives of those who lived there. The only negative about the experience was our tour guide turned us off a little by making modern political commentary, but otherwise we she was knowledgeable and we enjoyed the buildings and their history.
While we just went for the history, you can also use the island for recreation such as snorkeling, they have educational programs for groups, and I believe you can rent the buildings and still stay overnight.