Thank you!
I'm pretty sure it wouldn't be everyone's idea of a good time, but I loved it.
I tried to go urbex-easy seeing as honeymoons are intended for other interests as well
but we did also manage to get here:
It's an old smallpox hospital, by quite a preeminent New York architect, James Renwick Jr., (hence it's colloquially known as the 'Renwick Ruin').
Built on a small island off Manhattan, it provided isolation from contagious diseases, shelter for the poor and once housed the mentally insane.
It would have been a good explore once, but it's better known and (happily) by the looks of it under some sort of repair or reconstruction now.
Roosevelt Island is well worth a visit for anyone who's in New York and likes a bit of history or abandonment though.
For now though it's back to the devastation of evenings too dark to explore much and having to wait for free weekends (Whittingham, I'm looking at you again here)