In 1815, Mount Tambora in Indonesia erupted in what is considered the most powerful volcanic explosion in recorded history, leading to the "Year Without a Summer" in 1816 due to the volcanic ash affecting global weather.

In 1904, the Great Baltimore Fire raged for over 30 hours, destroying over 1,500 buildings and leading to the standardization of firefighting equipment and protocols across the United States.

The Dancing Plague of 1518 in Strasbourg saw hundreds of people dance uncontrollably for days, with some dancing to their deaths. The cause remains a mystery, with theories ranging from mass hysteria to ergot poisoning.

In 1720, the stock market bubble known as the "South Sea Bubble" burst in Britain, causing financial ruin for many and leading to significant changes in financial regulation.

The USS Cyclops, a navy ship with over 300 men and 10,000 tons of manganese ore, disappeared without a trace in the Bermuda Triangle in 1918, sparking one of maritime history's greatest mysteries.