La Venta, Tabasco. Mexico - Beginning in 1938, Matthew Stirling, chief of the Smithsonian Bureau of American Ethnology, led eight National Geographic-sponsored expeditions to Tabasco and Veracruz in Mexico. He uncovered 11 colossal stone heads, evidence of the ancient Olmec civilization that had lain buried for 15 centuries. (Photo by Richard Hewitt Stewart)
(via 125 Years of National Geographic - The Big Picture - Boston.com)

La Venta, Tabasco. Mexico - Beginning in 1938, Matthew Stirling, chief of the Smithsonian Bureau of American Ethnology, led eight National Geographic-sponsored expeditions to Tabasco and Veracruz in Mexico. He uncovered 11 colossal stone heads, evidence of the ancient Olmec civilization that had lain buried for 15 centuries. (Photo by Richard Hewitt Stewart)

(via 125 Years of National Geographic - The Big Picture - Boston.com)