National Museum of Natural History

You can almost sense the ghosts of generations of school parties dutifully trooping through the musty halls of this old-fashioned museum. The didactic collection of animal, plant and mineral specimens is vast, although there’s little labelling in anything but Bulgarian. Rocks, crystals and minerals grace the ground floor, while on the next two floors you can browse cases full of stuffed birds and animals, including a brown bear dangling a Nazi hunting medal from its claw and some threadbare apes, lions and tigers. Pickled fish and cases of dried insects complete the collection.