11. An entire crew went missing
The Mary Celeste was an American merchant brigantine that was found adrift and deserted in the Atlantic Ocean, off the Azores Islands, Portugal, on December 4, 1872, by the Canadian brigantine Dei Gratia. She was in a disheveled but seaworthy condition, under partial sail, with no one on board, and her lifeboat missing. The last log entry was dated ten days earlier. She had left New York City for Genoa on November 7, and on discovery was still amply provisioned. Her cargo of denatured alcohol was intact, and the captain’s and crew’s personal belongings were undisturbed. None of those who had been on board—the captain and his wife, their two-year-old daughter, and the crew of seven—were ever seen or heard from again
12. An unidentifiable humming sound appeared in random city
My favorite is The Hum, an ambient sound like an idling Diesel engine in the distance, heard in several locations around the world (Taos, NM being one), but no one knows what causes it or where it comes from.
13. A woman was found sliced in half
The death of Elizabeth Short, better known as the Black Dahlia case. After missing for a week her body was found in Los Angeles, sliced into half, with intestines stuffed under her buttocks and body appeared to be posed by whoever who dumped her. A Glasgow smile was also carved into her face, extending from the edges of her mouth up to her cheeks.
14. A hole in the ground won’t go away
In a village in Sweden called Röjdn there’s a cross-shaped “hole” in the ground that won’t go away. Over many years people tried to dig it out, fill it up, etc. but it comes back. Nothing grows there, and if you plan something in it it dies.