Greece, Attica, Athens, Stoa of Attalos and Agora Museum, Ancient Agora of Athens.

Greece, Attica, Athens, Stoa of Attalos and Agora Museum, Ancient Agora of Athens.

Greece, Attica, Athens, Hadrian's Arch.

Greece, Attica, Athens, Statues in the Palace of the Giants, Ancient Agora of Athens.

Greece, Attica, Athens, Temple of Olympian Zeus.

Greece, Attica, Athens, Temple of Olympian Zeus.

Greece, Attica, Athens, Archaeological site of a Roman bath, beside the National Gardens and Zappeion.

Greece, Attica, Athens, Archaeological site of a Roman bath, beside the National Gardens and Zappeion.

Greece, Attica, Athens, Lord Byron statue by French sculptors Henri-Michel Chapu and Alexandre Falguiere, National Gardens.

Greece, Attica, Athens, Temple of Olympian Zeus.

Greece, Attica, Athens, The Erechtheion, at the Acropolis.

Greece, Attica, Athens, The Erechtheion, at the Acropolis.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, feeds on the nectar of a tropical Hot Lips flower in Costa Rica.

Animals, Birds, Territorial competition between a male Magnificent Hummingbird, Eugenes fulgens, at right, and a female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, perched on a yellow Costu...

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, approaches a Hairy Heliconia flower to feed in Costa Rica. Photographed in high key for artistic effect.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, feeds on the nectar of a tropical banana plant in Costa Rica.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, feeds on the nectar of a Lobster Claw Heliconia in Costa Rica.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, perches on a yellow Costus flower while feeding. A female Purple-throated Mountain-gem Hummingbird, Lamporis calolaemus,...

Animals, Birds, A male Magnificent Hummingbird, Eugenes fulgens, feeds on a tropical Costus flower in Costa Rica. The position of the bird's wing illustrates the figure-eight beat pattern of hummingbi...

Animals, Birds, A male Magnificent Hummingbird, Eugenes fulgens, photographed in flight with high-speed flash to stop the motion. Costa Rica.

Animals, Birds, A male Magnificent Hummingbird, Eugenes fulgens, photographed in flight with high-speed flash to stop the motion. Costa Rica.

Animals, Birds, A female Purple-throated Mountain-gem Hummingbird, Lamporis calolaemus, feeds on the nectar of a Lobster Claw Heliconia flower in Costa Rica.

Animals, Birds, A female Purple-throated Mountain-gem Hummingbird, Lamporis calolaemus, photographed in high key lighting for artistic effect. Costa Rica

Animals, Birds, A female Purple-throated Mountain-gem Hummingbird, Lamporis calolaemus, feeds on the nectar of a tropical Hot Lips Flower in Costa Rica.