Two men gaze into the azure waters of Lake Tritiva near Antisirabe, Madagascar. The volcanic lake's waters are said to mysteriously rise during the dry season and fall during rainy season.

According to legend, two intertwined trees on a ridge above the lake contain the spirits of a young couple who leapt from a cliff to their deaths when they were refused permission to marry.

(Photo shot on assignment for, but not published in, "Madagascar: Island at the End of the Earth, " October 1967, National Geographic magazine)