Nefcerka is one of the wildest and most beautiful side valleys in the entire High Tatras — a hidden gem of Slovak nature that very few people will ever set foot in. Lush vegetation, dramatic rock faces, a chain of mountain lakes and three impressive waterfalls make it one of the most enchanting corners of the Tatras. The catch? It is strictly off-limits to visitors.

The valley stretches roughly 3 kilometres into the heart of the mountains, branching off from the middle section of Kôprová Valley. It is framed by powerful ridges: the Hrubý vrch ridge to the north, Furkotský štít to the east, and the peaks of Ostrá, Krátka and Kriváň with its long north-eastern spur to the south. The upper part splits into two branches — the main one leading beneath Hrubý vrch and Furkotský štít, and a side branch heading toward Škára. The Nefcerský stream flows through the valley, forming three waterfalls: the Lower Nefcer Waterfall, the celebrated Kmeť Waterfall, and the Upper Nefcer Waterfall. Nestled in the valley floor are the Lower and Upper Terianské Lakes and the Small Terianské Lake, surrounded by untouched wilderness.

• Nefcerka Valley is a strictly protected TANAP reserve and is completely closed to visitors — entry is forbidden for hikers and climbers alike. The surrounding ridges are also a no-go zone.

• The valley is strictly protected and inaccessible to visitors year-round.
• The ban also applies to climbers — the surrounding ridges are a closed zone.
• The valley can be admired from the trails of Kôprová Valley without entering it.

The name 'Nefcerka' has a fascinating backstory — one theory links it to Leonard Ján Neftzer, a royal administrator of Likava Castle in the late 17th century, while another suggests it evolved from old mining terminology meaning 'New Terian Valley'. The first recorded visit was by Eugeniusz Janota and companions, led by guide Maciej Sieczka, on 9 September 1867.