Exploring Oak Island, Nova Scotia, in 1795, three boys discovered an old tackle block hung from a tree directly over a circular depression. Excited by thoughts of buried treasure, the three dug down 30 feet, discovering a layer of flagstones followed by layers of logs about every 10 feet, according to news accounts in 1856. That attracted serious treasure hunters, and subsequent digs got as deep as 80 feet, where reportedly they turned up a large inscribed stone (“Forty feet below lies two million pounds”) just before the pit flooded.

That stopped the digging for a while, but it attracted still more attention. In 1849 a drill passed through the following layers, starting at the 98-foot mark:

• spruce platform
• 12-inch space
• 22 inches of “metal in pieces”
• 8 inches of oak
• 22 inches of metal
• 4 inches of oak
• another spruce layer
• 7 feet of clay

Reportedly the operators found three small links of a gold chain in the mud stuck to the drill. There have been at least 11 digs since then, ultimately producing nothing. Possibly “the money pit” still holds loot belonging to Blackbeard or Captain Kidd … but no one’s been able to find it.

A singular and highly remarkable case of diffused marine phosphorescence was observed by Nordenskiöld during his voyage to Greenland in 1883. One dark night, when the weather was calm and the sea smooth, his vessel was steaming across a narrow inlet called the Igaliko Fjord, when the sea was suddenly observed to be illumined in the rear of the vessel by a broad but sharply-defined band of light, which had a uniform, somewhat golden sheen, quite unlike the ordinary bluish-green phosphorescence of the sea. The latter kind of light was distinctly visible at the same time in the wake of the vessel. Though the steamer was going at the rate of from five to six miles an hour, the remarkable sheet of light got nearer and nearer. When quite close, it appeared as if the vessel were sailing in a sea of fire or molten metal. In the course of an hour the light passed on ahead, and ultimately it disappeared in the remote horizon. The nature of this phenomenon Nordenskiöld is unable to explain; and unfortunately he had not the opportunity of examining it with the spectroscope.

— W.S. Dallas in Wonders of Earth, Sea And Sky, 1902

Born to normal parents in 1846, Anna Haining Swan had reached nearly her mother’s height by age 6. She topped out at 7 feet 5 inches, 350 pounds, shortly after signing up with P.T. Barnum, who paid her handsomely.

Like other “freaks,” Anna was cultured and educated. She studied literature, music and acting, even playing Lady Macbeth. Still, her size presented problems. She was nearly trapped by a fire at Barnum’s museum in 1865 because she couldn’t fit through a third-floor window. Eventually she was lowered by block and tackle, with 18 men holding the end of the rope.

Anna was fortunate in love, though. She met Martin Van Buren Bates when the two were paired for a tour, and they were married in 1871, towering over the priest, who was 6 foot 3. They retired to a custom house with 8-foot doors, where she bore two children, one of which weighed 22 pounds at birth (neither survived). She was buried in an oversize coffin in 1888.

At her full height, Anna was nearly five times as tall as Caroline Crachami (1815-1824), the smallest person in recorded history. Born with primordial dwarfism, Caroline was only 19.5 inches tall. Her skeleton is on display at Scotland’s Hunterian Museum, and her story is recorded in Gaby Wood’s wonderfully titled Smallest of All Persons Mentioned in the Records of Littleness.

When Edward Leedskalnin’s fiancée left him at the altar, the Latvian eccentric moved to Florida and started building a castle to win her back. A very, very heavy castle: The structure is made of megalithic stones, mostly coral, each of which weighs several tons.

How he did it is something of a mystery, as the 100-pound artist worked only alone and at night. Some teenagers who glimpsed the construction said that he moved the blocks like hydrogen balloons. Leedskalnin gave no details but spoke of a “perpetual motion holder” and said he knew the secret of the Egyptian pyramids.

Anyway, did it work? Sadly, no. Leedskalnin spent 28 years building his castle, but when his erstwhile fiancée heard about it, she said, “I didn’t want to marry Edward when I was 16, and I don’t want to marry him now.” He died a few years later.