Zelenci Nature Reserve
The source of the Sava Dolinka, an intensely green pool fed by springs bubbling up through white sand.
Updated 22 October 2026
Zelenci is where the Sava Dolinka comes out of the ground, and the effect is unusual enough to have made it a small nature reserve: a shallow pool a couple of metres deep whose bed is white chalk sand, with springs rising through it so that fine sand boils up in slow plumes. The colour is a strong green that comes from the light on the pale bed rather than from anything in the water. A boardwalk crosses the marsh around it to an observation tower.
History
Zelenci was declared a nature reserve of 47 ha in 1992 for its geology and its endangered plants and animals. The painter Ladislau Benesch (1845-1922) was drawn to its springs, and in the 19th century Sir Humphry Davy wrote that he had seen nothing so beautiful in Europe as the valley of the Sava (Wikipedia, Zelenci).
Highlights
- The spring plumes - sand lifted in slow boils where the water enters the pool.
- The colour - a strong green produced by light on the white chalk bed.
- The boardwalk - a raised walk over the marsh and reed beds around the pool.
- The observation tower - a wooden tower giving the view down into the pool.
When to go
Year round; the colour is strongest under midday sun and weakest under cloud. Winter brings frost patterns and fewer visitors. Summer weekends bring coach parties from Kranjska Gora.
Good to know
It is small and the visit is short; twenty minutes covers it. The green is much less dramatic on an overcast day, which the photographs never show. Swimming and entering the water are forbidden.
Nearby
Kranjska Gora is east, and Planica is south.
Key facts
Source: Wikidata, item Q6957984, read on 18 October 2026.
What to pack for Zelenci Nature Reserve
Chosen from what this place is for. Tap a kit for the full checklist.
- Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
- Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
- Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
- Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.


