Article
ArchitecturalRecreationalConcrete Rock Bear Dens
Carl H. Johnson
Read MoreAnimal dens made of concrete and built to resemble natural rock formations are believed to have had their origin in the Denver, Colorado, Zoo in 1913,
Carl H. Johnson
Read MoreAnimal dens made of concrete and built to resemble natural rock formations are believed to have had their origin in the Denver, Colorado, Zoo in 1913,