• sulfuric pattern sulfuric pattern

    Tinto river :: Nerva, Huelva, Spain
  • metal acid water metal acid water

    Tinto river :: Nerva, Huelva, Spain
  • sulfur on water sulfur on water

    Tinto river :: Nerva, Huelva, Spain
  • sulphurous sediments sulphurous sediments

    Tinto river :: Nerva, Huelva, Spain
  • white stork nests at sunset white stork nests at sunset

    Ciconia ciconia :: Guadalquivir river (Sevilla, Spain)
  • volcanic flower volcanic flower

    Asteriscus maritimus :: Cabo de Gata (Almería, Spain)
  • yellow stone yellow stone

    Agrio river
  • common toad in sulphurous water common toad in sulphurous water
  • poplar and wind poplar and wind

    Populus nigra
  • poplars in autumn poplars in autumn

    Populus x canadensis