Misteriosa Bank

The Misteriosa Bank (Placer de la Misteriosa) is a submerged bank or atoll in the Caribbean Sea, located at – approximately equidistant from Mexico (380 km), Honduras (345 km) and Cuba (320 km).

Geographical data
The Misteriosa Bank is 39 km long and 3 to 11 km wide. Its area is 322 km2. Immediately south of it is Rosario Bank. The closest piece of land is the Swan Islands, Honduras, 140 km to the south and separated from it by the more than 5000 m Cayman Trough. The reported depth is 20 m on the average or up to 22 m, with depths of 14 - 18 m along the rim, or 12.8 - 49 m. It is part of the Cayman Ridge.

It is part of a cluster of seamounts of the Cayman mountain range contained in Honduras (Misteriosa, Rosario, Maud, Albion and Viciosas).

History
The bank was first reported by Spanish navigator Tomás Nicolás de Villa in April 1787.

In the 19th century Charles Darwin mentioned the Misteriosa Bank as an example of the sharply descending coral reef in his work Coral Reefs:

"Besides the coast-banks, there are many of various dimensions which stand quite isolated; these closely resemble each other, they lie from two or three to twenty or thirty fathoms [4 to 55 m] under water, and are composed of sand, sometimes firmly agglutinated, with little or no coral; their surfaces are smooth and nearly level, shelving only to the amount of a few fathoms, very gradually all round towards their edges, where they plunge abruptly into the unfathomable sea. This steep inclination of their sides, which is likewise characteristic of the coast-banks, is very remarkable: I may give as an instance, the Misteriosa Bank, on the edges of which the soundings change in 250 fathoms [460 m] horizontal distance, from 11 to 210 fathoms [20 to 380 m]..."

Currently a buoy has been anchored to the seabed of this feature. It appears to have been claimed by the Principality of New Utopia. The placing of the buoy was filmed by a German film crew and broadcast by Arte television on satellite. New Utopia maintains no state claims and wants to build a form of micronation on top of it, using concrete blocks.