The plant and animal world of the region is rich and varied.
Many rare and threatened with extinction species, included
in the Red book of Bulgaria (some of can be seen only in
this region of the World: Eranthis bulgaricus, Crocus
tommasinianus, Centaurea atropurpurea, Ramonda serbica).
Orchid family is wide-presented. The Museum of Nature
and Science has over 3000 flora and fauna exhibits from
the North-West Bulgaria.