One tree + four mirrors = an entire forest! Step into a small booth and experience an infinite number of trees. This installation by DUS Architects was shown to folks in Oosterdokskade, Amsterdam last month. http://www.dusarchitects.com/nieuws.php?taal=english&nieuwsid=118 -via Metafilter
(Image credits: Pieter Kers)
Its generally accepted that a 2 way mirror and and a 1 way mirror are the same thing; a mirror on one side and see through on the other side. Just saying.
source: wikipedia.
I think you mean a one way mirror.