This one is near Slavonice part of light bunkers museum. I don’t know if it wasn’t covered or if it is uncovered as a part of exhibition.
Near Vratěnín there is this one part of art project Bunker Cut. More on this here: https://www.ondrejbelica.net/bunkercut
Near Bratislava there is this one in flood prone region. Double deck let’s you use the higher level while lower level is flooded.
And some NCD use I found for them. It is excellent wind cover when you need to make dinner on the road.
Excellent, the first one looks so cozy. It must have been so much work for them to move all the sand. I hope your traveling dinner was so delicious, it was non-credible.