September 26, 1924. Washington, D.C. "Mysterious tunnel." A strong Hardy Boys vibe here. National Photo Company Collection glass negative.
UPDATE: While initial speculation (bootlegging, espionage) was soon dispelled by an eccentric insect expert's explanation that he had dug the passages "for exercise," historical evidence suggests that this was a tunnel of love. Or at the very least, bigamy. | Click image for Comments.
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