The ending reminds me of the day I proposed to my wife. We were walking around DC. I already was set on proposing to her somewhere in Georgetown (which I did in the end). But in the meantime, we were close to downtown, when we saw the Old Post Office (the one with the tall tower off Pennsylvania Ave south of Chinatown and Metro Center for those vaguely familiar with the city).
She had never gone up there, despite growing up in the DC area, not to mention high school and college few miles away.
We went up and enjoyed the sights. That ending on the lighthouse reminded me of that day in the tower. It wouldn't have been as romantic if I had proposed to her up there.