On the off chance it qualifies: Carma Island (KARMA-508), by @Dropout.
Once a lonely abbey sitting on a rock in the Atlantic, the island became a haven for pirates sailing between the Caribbean and the Rogue Isles, paying the monks hefty "indulgences" to forgive their plunder in the eyes of the almighty (and keep it safe). By the Golden Age of Pirates, the island's thin morals and thick bribes had grown it into a port town; understood as a neutral place where rich outlaws could carouse in safety and retire in peace. Today it's regarded as a Switzerland of the Americas, where supervillains meet to resolve very sensitive business -- but mostly to be old, rich and cranky somewhere no-one will bother them. It's currently open to outsiders to commemorate the 450th birthday of the original abbey.
The base had around 11000 items when this contest was announced and has around 13000 now. /Visscale 4 or higher is highly recommended!