Bajo Nuevo Bank, also known as the Petrel Islands, is a small, uninhabited reef with some small grass-covered islets, located in the western Caribbean Sea at 15°53′N 78°38′W, with a lighthouse on Low Cay at 15°51′N 78°38′W. The closest neighbouring land feature is Serranilla Bank, located 110 kilometres to the west.

Serranilla Bank 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.