A gigantic [Papier-mâché](http://en.wikipedia.org/wiki/Papier_mâché) [BNC Connector](http://en.wikipedia.org/wiki/BNC_connector) near the Marina. I have no idea from whence it came or what on earth it could conceivably be used for.
And before you ask – no, I did not find the [female](http://en.wikipedia.org/wiki/Female_connector) connector.