Bad things happen all the time as do mysteries. The question is not specific enough.
What happened to all the people aboard inside
Mystery House happened in 1980.
Mystery Circle happened in 1992.
Eggerland Mystery happened in 1985.
The Mystery of the Druids happened in 2001.
Mystery in London happened in 2007.
Tarot Mystery happened in 1995.
its a mystery about what happened to them.
what happened to the Mayan cultureThe great mystery of the Mayas talks about what happened in the ancient jungles of Guatemala and Mexico.
What ever happened to the original Mystery Incorporated
The Mystery Play happened in 1994-01.
the skeleton in the field what happened ?