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Know the answer to these unsolved mysteries?

Weekend TODAY launches their special series about unexplained events.

Weekend TODAY kicks off a month-long series on “Unresolved Mysteries: Discoveries, Disappearances, Unexplained Events.” This week there are some new answers to an ancient mystery. Who built one of Great Britain's oldest and most debated historical monuments?

For centuries everyone from sun worshipers and scientists to the mere curious have flocked to Stonehenge hoping to glean its true purpose.

What do you think?

Tune into Weekend TODAY Feb. 10 for more mysteries and to find out the voting results.