Postcard FI-4548825

Some cards appear very unspectacular at first glance. When you get to know them, they become more and more interesting, more so than most other cards. With a little internet research I found out and learned a bit about Saimaa Unesco Global Geopark - very interesting, and SO beautiful! Thank you very much for inspiring me, Pirkko!

Pursiala pothole: one of the largest potholes in Finland (depth 8 m, diameter 2-3 m). Formed about 11,400 years ago when meltwater from the subglacial river carved it out of the migmatite rock, which consisted of mica gneiss cut by younger granite veins.