A 40-minute drive from Dubrovnik, past panoramas of the Adriatic and green Konavle fields, brings you to this fertile valley, the region’s agricultural backbone. At Đivanović Mills, you can learn how flour was milled 500 years ago. Follow the forest path to the nearby restaurant of Konavoski Dvori for a taste of their famous trout dish and for the cool breeze off the Ljuta River. (Calling the mill in advance is recommended.)