Tucked away on the northeast edge of coastal Poland, just a few kilometres shy of Russia’s Kaliningrad enclave, Frombork is actually in Warmia (we won’t tell if you don’t) but has transport links with Pomerania. Its impressive walled complex overlooking the tranquil town and the water beyond is what people come to see, and the town is an enjoyable day trip from Gdańsk.
Alighting from the bus on the main road, what looks like a castle above you is, in fact, a cathedral, established by the Warmian bishops in the 13th century. The complex is the main draw in Frombork, but the icing on the cake is its association with Nicolaus Copernicus. It was here that he spent the latter half of his life and conducted most of the observations and research for his heliocentric theory. Copernicus was buried in the cathedral.