Thriller Bark

Thriller Barque (スリラーバーク Surirābāku, sometimes refered to as Thriller Park or Thrillerberg) is the name of an island located within the Florian Triangle. Not much is known about it at the time being, however, as revealed by Brook, it used to be from the West Blue. A famous doctor by name of Hogback lives in a mansion on the island.

Layout
This island is surround by an huge outer wall that goes around the island, the gate is a giant mouth that opens and closes. There are 4 sperated chains that connects from the wall to the sky above the mansion. This island has old broken inner stone wall encircling the island with towers and a moat. There is a mansion at the middle of the island surronded by a semi-dead forest

Thriller Barque Creatures
This island is inherited by monsters and Ghosts. A Vampire named Hildon lives here. There is a monster called a Cerberus, a Centaur that pulls the carriage and a Semi-Dead Hound. The "people" appears to be tattooed and stitched up with numbers printed on them