In addition to the historical regions, the islands can also be divided by geographical features, resulting in:
A group of dry, very flat, and geologically old islands (Sal, Boa Vista and Maio), lying to the east and closer to the African coast (which makes them a target for sand from the
Sahara desert, resulting in long sandy beaches, typically used for beach tourism), and
A group of rocky, volcanic, agricultural islands more to the west. Their
orography is rougher because they're geologically newer, and the westernmost islands (such as Santo Antão) tend to be the most mountainous.