It's the late Binghampton , ex Hudson River Ferry / floating nightclub / source of income for lawyers / derelict . The photo is from 2014 / In 2017 a giant floating crane appeared and...This looks the the bigger sibling to the one I posted a week or two ago.
Never taken the tour but been around it a few times. My brave #2 son swam from Alcatraz to the shore next to the Golden Gate Bridge during an Iron Man Marathon. He also rented a sail boat and took us around the Island. Water may look calm but it was like sailing over a boiling pot of water. The confluence of tidal waters coming in with the flow of water trying to exit the bay made the water very turbulent and noisy!