The cave colonies of Mars. Bob Zimmerman BehindtheBlack.com

Oct 19, 01:32 AM
Photo:Possibly Connected Lava Tube Skylight Pair in Tharsis Region USAGE POLICY
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NASA/JPL/University of Arizona

POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.
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The cave colonies of Mars. Bob Zimmerman BehindtheBlack.com

https://behindtheblack.com/behind-the-black/points-of-information/a-discontinuous-martian-channel/