Wielkopolska

Wielkopolski Park Narodowy is the park geographers use to teach the last ice age. South of Poznań, between Mosina, Puszczykowo and Stęszew, the Vistulian glaciation left its full inventory in one compact tract: moraine hills, sinuous eskers, kames, outwash sands, a scatter of granite erratics rafted from Scandinavia, and a fan of ribbon lakes lying in tunnel valleys the ice's meltwater cut under pressure. The park exists because Poznań botanist Adam Wodziczko argued for it from the early 1920s; the state finally obliged in 1957, by which time the pine-and-oak forest had grown back over centuries of cutting and inland dunes.

The set piece is Jezioro Góreckie, a hooked trough lake with two islets. On Wyspa Zamkowa stands the shell of a neo-Gothic folly that Tytus Działyński raised in the 1820s as a romantic gift for his sister Klaudyna — a ruin by design that the Second World War made a ruin in earnest. Around it the forest floor runs to wood anemones in April, kettle bogs hide in the hollows, and the quieter western lakes — Budzyńskie, Skrzynka — belong to grebes and otters.

This is, honestly and valuably, a citizens' park: the Poznań commuter line stops at Puszczykowo and Mosina on its edge, and locals use the trails daily, joggers and school parties included. Wilderness it is not — its point is that half a million city-dwellers keep a glacial landscape within a half-hour train ride. Puszczykowo adds the museum-workshop of the traveller-writer Arkady Fiedler, and the forests carry darker memory too: memorials mark where the occupiers shot Poznań's citizens in 1939–40.

What's worth knowing before you go

Take the train — services from Poznań to Puszczykowo and Mosina run roughly half-hourly and beat weekend parking. The natural hub is Jeziory on Góreckie's shore, with the park museum and director's office; from Osowa Góra the classic loop rounds the lake to the folly viewpoint. Sundays in high summer are busy family territory; midweek mornings the park is yours.

Spring and autumn are the honest seasons — anemone floors in April, fog-and-bronze beech in late October — while July can feel more municipal than wild. The connoisseur's errand is to hunt the big erratics in the beech shade, Głaz Leśników among them: lumps of Scandinavia dropped mid-journey, the park's quietest monuments to the ice that made everything else you're walking on.