Fiesa Beach, Piran: A Brick Factory Left Behind Slovenia’s Only Brackish Lake

Slovenia | Fiesa | Piran, Slovenian Istria

I’d read about the lakes behind Fiesa beach before going, and assumed they were some kind of ancient natural feature. They’re not. They’re what’s left of a clay pit dug for a brick factory operating here in the first half of the 20th century — industrial leftovers, essentially, that nature quietly took over once the digging stopped. One of the two lakes is now officially the only brackish lake in Slovenia, the other a smaller freshwater pool tucked behind reeds and shrubs, and together they were recognised as a natural monument of national importance back in 1989. I find something satisfying about a place this ecologically valuable having started life as an industrial scar rather than anything pristine.

The name itself has its own small story. Fiesa comes from the old Italian adjective fiesso, meaning bent or twisted, almost certainly describing the actual bend in the coastline here rather than anything more poetic — the modern feminine Slovenian name is a later adaptation of an older form recorded in 18th-century documents as Fontana di Fiesso. I like knowing the name is essentially a geography note rather than a legend, the same way I’d come to appreciate at a couple of other spots on this coast.

The reed banks around both lakes shelter something I genuinely hadn’t expected: around twenty species of rare and endangered dragonfly, along with marsh birds and fish that use the wetland as shelter. I stood at the edge of the larger lake for a while just watching dragonflies move between the reeds, close enough to the beach that I could still hear people swimming in the sea a short walk away — an odd but pleasant overlap of two completely different ecosystems sitting back to back.

Getting There: A Scenic 15-to-20-Minute Walk From Piran’s Old Town

I walked it from Piran, heading north past St George’s Parish Church and following the flat, paved promenade that hugs the base of the cliffs the whole way. It took me close to twenty minutes at an easy pace, with views back toward Piran’s old town for most of the walk — genuinely one of the nicer short coastal walks I did on this trip, not just a means of getting from one beach to another.

By car, the route comes down from the main road linking Koper and Portorož, turning toward the hill district of Beli Križ and winding down into the Fiesa valley, where a paid parking area sits behind the lakes. Spaces are limited, and I’d arrive early rather than risk circling. By bus, the local line connecting Portorož and Piran stops at the Beli Križ junction at the top of the hill, with a ten-minute downhill walk through olive groves covering the rest of the distance.

The Beach: Pebble and Sand, Pine Shade, a Gentle Entry

The shore mixes pebble with patches of sand, backed by grassy lawns and pine trees that gave me genuine shade for most of the afternoon I spent here. The water stayed calm and clear the whole time, sheltered by the cliffs rising on either side of the small bay, and the entry into the sea was gentle enough that I watched young children wading comfortably without their parents looking concerned. The underwater visibility was good enough that I saw a couple of people snorkelling near the rockier edges, and I’m told this is a reasonably popular small dive spot, though I didn’t see a dedicated dive centre operating directly on the sand myself.

Sunbeds and umbrellas are available to rent from May through September, with showers and toilets on site, and a couple of hotels — Hotel Fiesa and Hotel Barbara — providing food and drink right by the beach. I should mention plainly that dogs are not permitted on this particular beach, which surprised me slightly given how relaxed some of the other beaches I’d visited on this coast had been about it — worth knowing if you’re travelling with a pet and planning your day around this stretch specifically.

Walking On to Strunjan, or Back to Piran

The same coastal path that brought me here from Piran continues onward toward Pacug, roughly another twenty minutes further, and eventually connects through to Plaza Strunjan Main Beach Slovenia, the central beach I’d used as my own starting point for visiting Plaza Mesecev Zaliv Moon Bay Strunjan Slovenia elsewhere along this same stretch of coast. If you’re the kind of traveller who likes stringing several beaches together into one long walk rather than picking just one, Fiesa sits conveniently in the middle of that whole chain.

Fiesa Beach, between Piran and Strunjan, sits beside two lakes left behind by a 20th-century brick factory’s clay pit — one of them officially the only brackish lake in Slovenia, both protected as a national natural monument since 1989 and home to around twenty rare dragonfly species. The beach itself is pebble and sand, shaded by pine trees, with a gentle entry suited to families, sunbeds available in season, and dogs not permitted. A genuinely pleasant fifteen-to-twenty-minute coastal walk from Piran’s old town, with the same path continuing on toward Strunjan for anyone wanting to keep going.

Walk the coastal path from Piran rather than driving if you can. Spend a few minutes at the lakes before or after your swim. Continue on toward Strunjan if you want to turn the day into a longer walk.