Formerly known as - Sląskie Wesołe Miasteczko -> Silesian Amusement Park
This is the largest amusement park in Poland apparently, it also contains a zoo, planetarium, pool complex and various other things. Up until now its coaster line up has comprised of a couple of Pinfari knock offs and a Soquet Twin Looper, which formally resided Lightwater Valley and American Adventure.
They're currently building an absolute monster of a coaster called Lech Coaster, which is a new Vekoma Bermuda Blitz featuring the new track style which supposedly rides far better than their older rides. It looks amazing.
Vekoma have a video on their YouTube channel of a render of the coaster here.