The Dragonja river has a pluvial regime and often dries up during periods of no or little rain. It flows into the Adriatic Sea near Sečovlje. Along its path, it uncovers layers of flysch (a type of sedimentary rock), causes interesting geological processes and creates impressive gorges. Throughout the valley, there are many abandoned mills, settlements and farms which feature the authentic and characteristic Istrian architecture. The valley is also a popular destination for hikers and cyclists.