Today I visited the deserted island known as Egmont Key. It's near the big city of Tampa but completely removed from civilization. There is nothing here but an old fort, a ghost town, a lighthouse and miles of empty white sand beaches. Today was warm and sunny, yet there was only a handful of people that bothered to take the ferry out here. That meant I could walk for miles along the shore without seeing anyone. I walked the circumference of the island and somewhere halfway between one end and the other I spotted this couple.
The island reminded me a little of the island on Lost, except there are no mountains. I think that during WW2 there was a lot of activity on account of its location as a gateway into Tampa Bay. But now it's a state park accessible only by boat and so remains largely deserted save for a park ranger, sea birds and a few daily visitors.
To get here you catch a ferry from Fort DeSoto Park in St Petersburg. There are only two scheduled departures in the morning and then two return trips in the afternoon. The last return leaves at 2:30 so if you miss it you're on your own. You might as well look for a place to shelter for the night. In that case you could wander over to the ghost town, I'm sure they'll have a room there.