When you are in Portoroz, you must walk to the nearest medieval town, Piran.
They sit next to each other almost.
About 5 km south-east of Piran or about 20 minutes by bus if you don't feel like walking.
Piran has the old Venetian charm that could lure people with its medival cobble-stoned streets, churches, the old lighthouse, houses & a marina packed with boats & yachts.
walk around the Old Town in Piran & you can see that almost everything from the Venetian rule is still very much intact !
It is definitely the Ole World charm next to the
honky-tonk beach resort that we call Portoroz.
Formaviva is an interesting garden reacheable on foot from Portoroz and past Lucja. It's an open air museum housing several statues made by local artists as well as artists from abroad - all statues are carved into stone and most are abstract. The statues were collected over a 40 years period, from 1961 to 2001.
It's worth going there even if you're not interested in art, since the views over Portoroz bay are quite good.
To get there walk first to Lucja and then reach the go-kart circuit. On the left there's a campground: follow the road on the right that heads up the hill and continue walking.