It is located only 4 kilometres (2.5 mi) away from the North-African shore, in front of the Moroccan town of Ras Kebdana.

[3] Substantially flatter than the Isla del Congreso, it reaches a maximum height of 35 metres above sea level.

[2] Archeological remains found in the island suggest the existence of an outpost intended for sheltering ships by the 1st century BC, a time when the North-African coastline thrived during the reign of Juba II.

[8] The work of conditioning the island of Isabel II suffered a major setback after the passing of a strong storm in March 1849.

It currently hosts a military garrison with personnel from the Ministry of Environment of Spain, as the islands are a National Reserve protected because of the wealth of their natural species.