The province is hilly and mountainous, with only 1,631.5 hectares or 7.1% of its area level to undulating, and 78.2% or 17,994.4 hectares varying from rolling to steep and very steep. Forty two percent (42%) or 9,734.40 hectares are steep to very steep land. Because of the terrain of the province, drainage is good and prolonged flooding is non-existent. The main island of Batan has the largest share of level and nearly level lands, followed by Itbayat and Sabtang, respectively. Itbayat has gently rolling hills and nearly level areas on semi-plateaus surrounded by continuous massive cliffs rising from above sea level, with no shorelines. Sabtang has its small flat areas spread sporadically on its coasts, while its interior is dominated by steep mountains and deep canyons. Batan Island and Sabtang have intermittent stretches of sandy beaches and rocky shorelines.