Near the village of Velké Březno there is an interesting rock formation called Skalní hřib.
It is a volcanic rock that reaches a height of about 5 metres. The site is protected as a natural monument Magnetovec - Skalní hřib. Not far from this rock is the Magnetovec hill, which reaches an altitude of 521 metres. Access to this natural attraction is possible along the green hiking trail from Velký Březno or along the unmarked trail from Byňov.