Nadsansky Regional Landscape Park is one of the most unspoiled corners of the Ukrainian Carpathians, tucked right up against the Polish border in Lviv Oblast. The park was created to protect the upper San River valley and its natural hydrological character, and together with the Polish 'San Valley Landscape Park' it forms a single, seamless cross-border wilderness. If you are after raw mountain scenery, crystal-clear streams and ancient beech forests, this place will not disappoint.

The park sits between 650 and 950 metres above sea level, with three main ridges — Chervony Verkh, Sanskyy and Buchok — running northwest to southeast. The highest point is an unnamed summit in the Buchok ridge at 951 m. One of the most remarkable features here is the Main European Watershed, which passes right through the park, dividing the Baltic Sea basin (San River) from the Black Sea basin (Dnister River) — you can literally stand on the continental divide. Spring brings snowdrops and Heuffel's crocuses to the meadows, summer offers cool beech and silver fir forests, and autumn turns the whole landscape into a blaze of gold and amber.

• Sianky village (railway station on the Lviv–Uzhhorod line) — starting point for walks along the upper San valley; easy to moderate difficulty.
• Nizhnia Yablunka (railway station) — alternative entry point to the eastern part of the park.
• Boryna (park headquarters) — good place to pick up information before heading out; accessible by bus from Sambir.

• The park is part of the international 'Eastern Carpathians' Biosphere Reserve (UNESCO), shared with Poland and Slovakia.
• The remote San valley section has virtually no settlements — carry sufficient supplies and a map for longer hikes.
• Brown bears, wolves and Eurasian lynx inhabit the park; exercise standard wildlife precautions.
• Mountain climate: average January temperature −2.3 °C, July +16 °C; best hiking season is June to September.

Here is a remarkable fact: the source of the San River lies just south of Sianky village, while the source of the Dnister is only a few kilometres away near Vovche — making this one of the rare places in Europe where you can visit the headwaters of two rivers flowing to different seas on the same day trip.