|Major islands||Beacon Cay| |Department||San Andrés and
Providencia| Serranilla Bank (Spanish: Isla Serranilla or Banco
Serranilla) is a partially submerged reef, with small
uninhabited islets, in the western Caribbean Sea. It is situated
about 350 kilometres (220 mi) northeast of Punta Gorda,
Nicaragua, and roughly 280 kilometres (170 mi) southwest of
Jamaica. The closest neighbouring land feature is Bajo Nuevo
Bank, located 110 kilometres (68 mi) to the east. Serranilla
Bank was first shown on Spanish maps in 1510. It is administered
by Colombia as part of the department of San Andrés and
Providencia. Although the bank is currently occupied by
Colombia, it is subject to a sovereignty dispute involving
Honduras, Nicaragua, and the United States. |This section
requires expansion. (November 2011)| Serranilla Bank is a former
atoll, now a mostly submerged carbonate platform consisting of
shallow reef environments. It is about 40 km in length and 32 km
in width, covering an area of over 1200 km2, almost entirely