An islet lying off the north coast of the Yucatán peninsula according to several maps of the Gulf of Mexico from the 16th to the 20th centuries.
Allegedly located southeast of Madagascar, it was reported on maps and charts of the 17th and 18th centuries, sometimes depicted alongside another phantom island, dos Romeiros.
This one is said to lie in the Atlantic Ocean, west of Ireland. It is cloaked in mist except for one day every seven years, when it becomes visible but still can not be reached.
Atolls supposedly visited by Spanish explorers Alvaro de Saavedra in 1528 and Ruy López de Villalobos in 1542, it was placed northeast of the Mariana Islands on a few maps.
The island, first depicted in 1424 northwest of Spain and Portugal, was purportedly full of evil demons. It disappeared on almost all maps after Christopher Columbus's voyages.
The island, first sighted in 1907, then multiple times in the 1930s, was named after a type of mirage common in polar regions.
Situated just to the east of the Flemish Cap, belief in its existence continued into the 19th century, when it was discussed as a possible midway point for the telegraph cable.
A German merchant claimed to have seen this Caribbean island in 1884. He failed to find it again in subsequent expeditions.
From the late 17th century up to the early 19th one, Pacific Ocean charts registered an island east-northeast of Hawaii, supposedly near the place where a Spanish woman drowned.
A reef found by the captain of the ship Ernest-Legouvé in 1902. It is near the location of Lincoln Island, the main setting for Jules Verne's The Mysterious Island.
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