We recently visited San Francisco for our first wedding anniversary. Alcatraz has always fascinated me, though I don't know why - I guess the movies and the history. Seeing it in the flesh was eye-opening, they've done a superb job maintaining the island and buildings.
Naturally Alcatraz's interior isn't particularly well lit so I relied on some pretty huge ISOs to allow for reasonable apertures and shutter speeds here, but given I knew I would perform a mono-conversion it worked pretty well.