The "Life and Death in New York" tour was fantastic. My wife and I live in Brooklyn, and the guide exposed all sorts of little nooks and crannies with cemeteries, burial grounds, churches, cenotaphs, and other things we didn't even know existed in Lower Manhattan. Wow.
K. Krombie has encyclopedic knowledge of the subject matter, and New York City history in general, and is funny and engaging without losing the substance. I would highly recommend this tour, and I'm looking forward to trying one of her other tours in the future.