Wigry

Wigierski Park Narodowy, created in 1989, protects the centrepiece of the Suwalszczyzna's young-glacial lakeland: Lake Wigry itself, seventy-three metres deep, glass-clear over marl, and so convoluted with bays, headlands and islands that its twenty-one square kilometres feel like a small archipelago. Around it lie some forty further lakes, from big open troughs down to the sucharki — brown-water dystrophic kettles ringed by quaking sphagnum — and through the whole system threads the Czarna Hańcza, the country's classic kayak river, entering milky-cold and leaving tea-dark for the pines of the Puszcza Augustowska. Winters here are the coldest in lowland Poland; the Suwałki region is the national cold pole, and the lake carries ice most years.

The peninsula jutting into Wigry's northern basin holds the park's improbable landmark: a Camaldolese monastery planted in 1667 by royal foundation, its seventeen hermit houses ranked below the church on a hill the monks re-shaped themselves. Prussia suppressed the order after the partitions, war levelled much of the complex, and the rebuilt eremitorium now takes guests — John Paul II slept here in 1999, which the Suwalszczyzna has not forgotten. The monks' economic legacy runs right through the park in fishery, forest clearings and village names.

The park's living emblem is the beaver — lodges and fresh-felled aspen stud every backwater of the Hańcza, and the local restitution was so complete that Wigry became the stock for reintroductions elsewhere in Poland. Underwater the park keeps a genuine rarity: a self-sustaining population of vendace, the whitefish of cold deep lakes, which the park's own fishery still nets under quota exactly as the monastery's once did.

What's worth knowing before you go

Stary Folwark, with the park museum, is the natural base, ten kilometres from Suwałki, which has rail from Białystok and Warsaw; local buses and a lakeside cycle route cover the rest. Kayaking the Czarna Hańcza wants booking ahead in July and August, when the route becomes a slow procession — June and September give the same river with herons instead of queues.

Winter is the connoisseur's season if you can take it: ice thick enough to walk, hoarfrost forests, and the monastery graphic against low sun. At any season, finish at Czerwony Folwark and buy hot-smoked sielawa straight from the park fishery — eaten warm on the jetty, it is the taste of the lake's cold bottom water.