Has anyone seen any good fossils visible in the stone of buildings, walkways, etc? I just think it's kind of neat to stumble on a fossil unintentionally incorporated into the masonry.
Springdale cemetery here in Peoria has a somewhat delapidated walkway up to an area of graves made of tiles of some sort of slate-type stone with a number of ammonites visible in it.
Another instance was on a job i was doing, a big new house where some masons were building a retaining wall out back. My (biz) partner was walking by their pallets of stone and noticed a pretty sweet trilobite on the surface of one of the blocks, so we pointed it out to them. They were totally unimpressed but we convinced them to put that block on top anyway. Later on I brought it to the attention of the homeowner, who didn't particularly care either, but there you go.
Do you know of any particularly good urban fossil sightings?