Rtexal T.
Google
The most impressive single artist gallery I have been too. Firstly, it's filled with works and themed rooms! The area is pretty huge with it's multi levels installation and mega sized outdoor sculptures.
With a really unique artistic sense and industrial metal and woodworking capabilities, the objects created are all really fascinating. The artist predominantly works with aluminium, wood, metal nails and rocks.
As you are arriving in this rather remote location, you will see a huge tree sculpture made out of aluminium atop the building.
Just make sure you leave 2-3h here at least to go through the exhibits at good pace and perhaps spend some time in it's beautiful cafe too.