Amelia Earhart's disappearance remains unsolved for 80 years.
Unearthed lost fort of Acra symbolizes historical Jewish revolt.
The unsolved mystery of the Crooked Forest in Poland featured in this beautiful photo series.
Por-Bajin, which has baffled scholars for decades, is considered one of the most mysterious archaeological sites in Russia.
Two years ago, a disturbing creature was seen floating in the Persian Gulf by an Iranian supply vessel.
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