The group is the northernmost in the Cuyo Archipelago, consisting of several islands and rocks.

The easternmost of which is a circular group of islands surrounded by reef about 6 nautical miles (11 km; 6.9 mi) in diameter.

The island group also includes the upscale resort island of Pamican located about 5.6 nautical miles (10.4 km; 6.4 mi) southwest of the circular group,[1] and Manamoc Island located 3.0 nautical miles (5.6 km; 3.5 mi) further southwest of Pamilacan.

[2] These mostly hilly islands are of limestone formation, have no permanent streams, and very little wood, but are covered with tall grass.

Most of the inhabitants live along the coast, and there is some cultivation on the larger islands.