Fodor's Expert Review Limski Canal

There's even a bit of Norwegian-style fjord in Croatia. The Limski kanal is a 13-km-long (8-mile-long) karst canyon, whose emerald-green waters are flanked by forested valley walls that rise gradually to heights of more than 300 feet inland. The canyon was formed in the last Ice Age, and it is Istria's most fertile breeding area for mussels and oysters—hence, you'll find the excellent Viking seafood restaurant on-site. Tours are available from both Poreč and Rovinj with various agencies and independent operators, whose stands and boats are impossible to miss. A reservation a day or two in advance can't hurt, though, particularly in midsummer. Expect to pay approximately 150 Kn for the four-hour tour or 250 Kn for a day-long tour that includes a "fish picnic." You can also visit the canal on your own by car. And hiking enthusiasts can take a trail to the Romualdova Cave, open daily from June to September.