Limski Canal
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 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 €25 for the four-hour tour or €50 for a daylong 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, which is open daily from June to September.
