One of the several databases I have in GSAK is a database of "bucket list" caches. This database contains caches which are just outside my normal caching radius or abilities. The largest percentage of the caches in this database are U.S. caches placed in 2001; the remainder is mostly comprised of (hopefully) cool caches I have had recommended to me by other cachers and a few others I have stumbled across in searches as well as high-popularity caches like Groundspeak headquarters. I also keep a bookmark list that mirrors this database so I can request a PQ to update the entire database when needed.
Do you keep a bucket list of caches? Have you found any caches on such a list you would recommend to others? Have you found a cache outside of the typical Maine cacher's range you would recommend?