Any mention of the lost cities supposedly found just off the west coast of South America? The newspapers in March and April 1966 had stores of them on the front page.
That kind of rings a bell; there were stories about those purported finds in the adventure mags of the time, like Argosy, True, and Saga, if memory serves — not that those were the most reliable sources of course. ;’)
> Ruins of roads and buildings found off Bimini Island in the 1960’s by the photographed and published expeditions of Dr. Mansan Valentine. Steven Forsberg, co-founder of the Lahaina Times newspaper dove into these ruins in 1982 to witness them first hand... In the Pacific, ruins of an ancient city were explored on the ocean floor off Ponape Island. Another was found underwater 30 miles off Easter Island. A ruined road on Karotonga Island goes into the ocean, runs underwater for many miles, and comes out of the ocean on another island in a straight line! Professor Menzies, from Duke University, photographed a ruined civilization on the sea bottom between Peru and Tahiti with unknown hieroglyphics on a column. Monolithic ruins from a lost civilization were found on a half dozen South Pacific Islands, which are said to be Lemurian mountain peaks above water.
http://www.bibliotecapleyades.net/atlantida_mu/esp_atlantida_5a.htm