Čaven is a ridge above the Vipava Valley in southwestern Slovenia.

It constitutes the southern rim of the Trnovo Forest Plateau in the northern Dinaric Alps.

From Čaven, one may view the Vipava Valley and the landscape to the Adriatic Sea.

), there is a prominent reef limestone site with fossils of coral colonies and hydrozoans.

[2][3] Čaven is the growing site of various brooms (Genista) and of the endemic herbaceous perennial Hladnikia pastinacifolia.