Which country is sometimes called the Land of a Thousand Lakes?

Finland's lakes are a direct legacy of the last ice age. A kilometres-thick ice sheet scoured the bedrock, gouging hollows and dumping ridges of debris, and when it retreated the meltwater filled the depressions behind those moraines. The result is a landscape in the south and east that is less a country with lakes than a mosaic of water, islands and forest, threaded together by channels and used for centuries to float timber down to the mills. The land is still rising as the crust rebounds from the weight of the vanished ice, so the coastline of the Gulf of Bothnia slowly creeps outward and new islands emerge over generations. The nickname undersells the reality considerably, since the true count of lakes runs into six figures depending on the minimum size counted, and the lakeside sauna and summer cottage remain a central part of Finnish life.

The same ice sheet left neighbouring regions of Russia, Sweden and Canada with lake-strewn landscapes for exactly the same reason.