Fly agaric

The fly agaric (Amanita muscaria) is a striking mushroom, which is common in the lowlands. Eating it can lead to symptoms of poisoning, but the severity of this usually falls.
Fly agarics grow mostly in deciduous forests, in close association (symbiosis) with birch, chestnut, oak, beech, also with pine and fir. They form an ectomycorrhiza, which means that the mycelium does not penetrate into the roots of the tree, but surrounds the hair roots on the outside.
The best-known appearance of the fly agaric is a dark red hat with white dots. The white dots are remnants of the overall shell (velum universale) in which the mushroom was 'locked up' before it rose from the ground.

The bottom is also beautiful. It looks like slats.
See Slats