Klácelka is a man-made cave in a forest near Liběchov, Czech Republic.
He chiseled from sandstone rock a cave that is an allegorical Blaník - a hall of sleeping heroes.
These include the leader of the soldiers of the mythological army Zdeněk Zásmucký, the Hussite leaders Jan Žižka and Prokop Holý, the sleeping Blaník army, and the dwarf figures wielding weapons for them.
The interior walls of the cave are festooned with reliefs from the fable Lišák Ferina by Klácel.
The theme of Blaník, central to the Klácelka, harks back to Protestant symbolism and the memory of the Hussite Wars, notwithstanding the Catholic monarchy of the times.