Olive Baboon glaring at Vervet Monkey (Green Monkey), Grumeti, Tanzania

Green tent braced with lava rock, Askja volcano, Icelandic highlands, Iceland, Europe

Close-up view of the iconic Colosseum against a blue sky, showing a marble plaque above the East Entrance dedicated to Christian martyrs; Rome, Lazio, Italy

USA, Arizona, Fountain Hills, saguaro cactus supported by planks, USA, Arizona, Fountain Hills

USA, Arizona, Fountain Hills, saguaro cactus supported by planks, USA, Arizona, Fountain Hills

USA, Arizona, Fountain Hills, saguaro cactus supported by planks, USA, Arizona, Fountain Hills