"A secret bunker hidden deep within the deserts of New Mexico is reported to be the 'alien space cathedral"'of the Church of Scientology, according to the author of a new book on Scientology.
"The site is marked by a large symbol etched onto the desert floor: two diamonds surrounded by a pair of overlapping circles, according to the British newspaper The Sun. A private airstrip, built to serve the controversial church's leaders, is within walking distance of the symbol."Scientologists' Alleged 'Alien Space Cathedral' Found
Older article in Washington Post on Trementina.
Google Maps Link - Aerial View