There's more to do than dreamily stroll around this Istrian gem. One historical wonder worth visiting are the Walls of Piran, a feat of 7th century to early 16th century architecture surrounding the city.
The city walls are well-preserved, with narrow stairways allowing you to explore. The views of the city below are, as you'd expect, quite something, too.
In the peak summer months (May to August), it's possible to see brown bears roaming the grassy wilderness of the Dinaric Alps. There are approximately 400 living in the region, and a number of tours are available to help you spot and photograph these great creatures in their home. It goes without saying you'll need a guide to get the most out of the experience.
The Dinaric Alps also offer prime birdwatching opportunities, with over 276 species seen in the area. Over 100 butterflies can be seen, too. Another of Slovenia's great lakes, Lake Cerknica, pools into existence for eight months each year. This protected wetland is incredibly biodiverse, and with it comes plenty more potential wildlife sightings.
In the heart of the Dolenjska region is the town of Novo Mesto. Awarded the Slovenian Green Destination label of silver, it's little wonder, as everything here seems brilliantly bright green and natural.
Get your camera ready, for photographing the colourful homes (pictured above) on the bank of the swirling, turquoise River Krka. In the Old Town, you'll find everything you'd expect: a 16th century town square, a Franciscan monastery, the Cathedral of Saint Nicholas, and the fascinating Bishop's Palace.
There's also one of the largest prehistoric graveyards in Europe. Follow the Amber Road trail for a thorough walking tour through Novo Mesto's highlights.
You can also take a hike through the nearby historic Gorjanci Hills. The highest peak, Trdinov Vrh, is 1,178m tall, but there's miles of surrounding forest to explore, too.
For all the lakes we've mentioned, we'll now turn our attention to caves. Slovenia is the perfect place to try your hand at cave exploration, with the UNESCO-listed Skocjan Caves being one of the top locations.
It dubs itself a 'true open-air museum', with surface-level walking trails and the underground cave system, hidden beneath a Karst. There are tours to explain its natural significance year round, and this experience can easily be done on a day trip from Ljubljana. It's approximately one hour and 10 minutes away by car.
Another of the most famous caves to explore is in the south-west. Postojna Cave is another Karst cave system – made of limestone and 24,340m long, making it the second longest in the country.
Inside, it is truly spectacular. Once you've explored Postojna's natural majesty, head above-ground and travel 9km away to Predjama Castle, the largest castle to be built inside a cave mouth in the world.
Of all the Slovenian delights to try, one of the sweetest literally and figuratively is Potica: a deliciously doughy roll flavoured with walnuts, hazelnuts, honey and sugar. It's traditionally a festive pastry, so a dash of brandy or splash of rum is rarely amiss.
It shouldn't be hard to come by, but if you're out of luck trying to taste this nutty dessert, we'd suggest searching for a local experience to help you make your own. There are sessions for visitors in Lake Bled, for example.
Škofja Loka is a fairy tale-and-a-half. It may be a small town, but it makes up for its stature with its breathtaking scenery: classic pale-coloured homes with sunny orange roofs, hugged by bushy green hills.
The setting of the Škofja Loka Passion Play, Slovenia's oldest piece of theatre, its protected as a UNESCO List of the Intangible Cultural Heritage of Humanity
It's well worth passing through for a day (or two if you can spare), if for nothing else but its centrepiece: the medieval Škofja Loka Castle and Museum. First built in the 12th century, the building you'll see today was made in the 1500s.
There's a short walk to the castle, and about two to three hours-worth of museum to explore. There's a mill, and a brilliant viewpoint with excellent views over the town, so bring your camera.
Those keen to learn local history will want to have Stanjel in their itinerary. Thought to be one of the oldest settlement in the Karst region, dating back to the 1400s, this village has centuries upon centuries of change to discover.
Notably, Stanjel was fortified in the 1600s to defend itself against raids during the Ottoman wars. Despite its historic significance, some of what you'll see - including the castle - has been rebuilt in the years following World War II, after fires swept through the village.