The Infinity Room

This is The Infinity Room at House on the Rock, once the world's longest cantilevered structure which could be occupied by humans. It stretches 218 feet, 168 of which are an unsupported cantilever. This record was broken in 2006 by the Guthrie Theater in Minneapolis.

Might I add that House on the Rock is my absolute favorite place on the face of the earth, and if you are ever in Wisconsin you absolutely need to see it. I just returned from my 8th visit.