Gawd, the books. Thousands of them, collected over a lifetime and spanning a Dewey Decimal range of subject matter. There must be two dozen dictionaries, including dictionaries of philosophy, behavioral psychology, and Buddhism, an OED, a massive two-volume dictionary of Sanskrit, and a huge dictionary of Canadian English.
There are a few special pictures on the walls, including one original oil I purchased in a Carmel gallery from a then-unknown artist who later made good (value multipled about 20x). I have a very small but respectable collection of antique Limoges porcelain. Otherwise it is old furniture and other old stuff—not antique, just old, maybe unique by now just because all of their contemporaries have long since made it to the recycle yard.
@jonsblond, I have a wooden loon too!