- IQpuzzles - Featuring extensive variety of quality jigsaw puzzles, mechanicals, disentanglements, mind-bogglers and educational toys.
www.iqpuzzles.com
- Rec.puzzles archive locations - A directory of rec.puzzles archive locations for North America, Europe and Asia.
xraysgi.ims.uconn.edu/others.html
- The American Treasure Hunt Society - Specifically, elaborate, cryptic adventures created as puzzles to be solved, as opposed to the search for real lost or sunken treasure. This hobby is often referred to as Armchair Treasure Hunting.
www.treasurehunt.org
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