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July 24, 2015
James Turrell’s Roden Crater
--you can see images of the sun and moon on the surface of a large basalt stone called the “image stone.” Leading up from that stone is an approximately 900 foot tunnel that leads to a portal—an opening to the sky. The 900 foot tunnel acts as a giant refractor telescope and contains a very large lens at the center to focus the light. | Amusing Planet
Posted by gerardvanderleun at July 24, 2015 9:06 AM. This is an entry on the sideblog of American Digest: Check it out.