An English Backyard Is Hiding A Shell-Covered Maze Built From 4.6 Million Shells And No Answers

The world is full of unsolved mysteries. Codes, puzzles, and cryptic public art tease us with their intrigue, and have left some of our most revered historians, cleverest cryptographers, and most determined treasure hunters, completely baffled.

A mysterious underground grotto encrusted in 4.6 million seashells has got people wondering. While some speculate it was once a smugglers’ hideout, others think it might have been an ancient pagan temple, but nobody has a clue who built it.