It is about 1.2 km (0.75 mi) long with the highest elevation at 381 feet high.

[1] The whole island was formerly occupied by Fort Hughes, a U.S. defense fortification before World War II.

[3] The gap between the two islands is only about 1/4 mile with a depth of 7 fathoms (42 feet; 13 meters) and is never used for large vessel navigation.

[1] In November 2014, Filipino peacekeepers from Liberia who were quarantined on the island for 21 days due to concerns about Ebola were cleared to return to the mainland.

Remains of the old fortifications, batteries and structures have been left rusting in the open after it was abandoned after World War II.