Wood trunk staircase.
https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...970#post153016
https://www.homemadetools.net/forum/...452#post127604
https://www.homemadetools.net/forum/...130#post141387
https://www.homemadetools.net/forum/...021#post134039
https://www.homemadetools.net/forum/...465#post122598