The monumental stairs of the Apadana, the subject nations of the Persian Empire paying tribute to Darius I, Persepolis, Iran, Middle East

The monumental stairs of the Apadana, the subject nations of the Persian Empire paying tribute to Darius I, Persepolis, Iran, Middle East

The monumental stairs of the Apadana, the subject nations of the Persian Empire paying tribute to Darius I, Persepolis, Iran, Middle East

Cuban paintings, Havana, Cuba, West Indies, Central America

Antique shop on Main Street, Essex, Massachusetts

Head and shoulders portrait of mature woman with black hair looking at camera, Kerala, India

The Budakirkja, commonly known as Iceland's Black Church, is a landmark in the town of Budir on the Snaeffelsnes Peninsula, Iceland

The Budakirkja, commonly known as Iceland's Black Church, is a landmark in the town of Budir on the Snaeffelsnes Peninsula, Iceland

The?Budakirkja, commonly known as?Iceland's?Black Church, is a landmark in the town of?Budir?on the?Snaeffelsnes?Peninsula, Iceland

A camper on the coastal plain, 1002 Area, of the Arctic National Wildlife Refuge looks back towards the mountains, Alaska.

Spencer Skipper in a big, blue tube in Mexico.

A fisherman rigs trolling lines for big game fish in the Pacific Ocean off Midway Atoll, Hawaii.

Head ands shoulders portrait of mid adult man with beard and mustache carrying sack on head, Kerala, India

Head and shoulders portrait of mature man with gray hair looking at camera, Kerala, India

A salt water fly fisherman catches and releases a striped bass on the white sand flats off Chatham, Cape Cod, Massachusetts.

The sun rises over a Greek Chapel perched above the Gulf of Petalion outise of Athens. (Photo by David McLain, Aurora)

A salt water fly fisherman fights a striped bass in Chatham, Massachusetts.

A salt water fly fisherman fights a striped bass at Monomoy National Wildlife Refuge, Massachusetts.

A person kayaks near a waterfall in Lago Yelcho, Chile.

Three caribou (Rangifer tarandus) walk by oil storage tanks near Prudhoe Bay and the Point Lonely Short Range Radar Site, where the Central Arctic herd migrates north each summer, Alaska, United States of America

Aerial view of TexasGulf Potash Ponds which are solar evaporation ponds used in the process of mining potash. Potash, a water-soluble potassium salt is extracted and blue dye is added to increase the rate of evaporation. It is mainly used in fertilizer products but also in the making of soap, glass, ceramics and batteries. The mine is currently owned and operated by Intredpid Potash Inc and the ponds cover 400 acres of land surrounded by sandstone cliffs and wilderness near Moab, Utah, USA, Utah, United States of America

Lone snorkeler floats in waters off a palm tree-dotted island in the Tobago Cays, near Bequia, Saint Vincent and the Grenadines, West Indies

Captured in mid-air, a diver plunges towards tropical waters, Bequia, Saint Vincent and the Grenadines, West Indies

Chalk cliffs by the sea., Monsklint, Island of Mons, Denmark

Spain, Catalonia, Barcelona, People on the steps below the main facade of the Gothic Cathedral in the Old Town district.

Spain, Catalonia, Barcelona, Sightseers at the Arc del Triomf built for the 1888 Universal Exhibition designed by Josep Vilaseca in the Mudejar Spanish Moorish style as the main gateway into the Parc de la Ciutadella in the Old Town district.,

Spain, Catalonia, Barcelona, Bronze statue of the Catalan hero Pau Claris, a lawyer, clergyman and president of Catalonia who proclaimed the Catalan Republic in 1641 standing in the Parc de la Ciutadella in the Old Town district.

Spain, Catalonia, Barcelona, Art Nouveau tiled facade of the Escriba pastry shop on La Rambla in the Old Town district.

Spain, Catalonia, Barcelona, Castell dels Tres Dragons built for the 1888 Universal Exhibition now housing the Museum of Natural Science and Zoological Museum in Parc de la Ciutadella in the Old Town district.

Spain, Catalonia, Barcelona, The spires of the basilica church of Sagrada Familia deisigned by Antoni Gaudi seen through the branches of a tree in the Eixample district.

Spain, Catalonia, Barcelona, Castell dels Tres Dragons built for the 1888 Universal Exhibition now housing the Museum of Natural Science and Zoological Museum in Parc de la Ciutadella in the Old Town district.

Spain, Catalonia, Barcelona, Castell dels Tres Dragons built for the 1888 Universal Exhibition now housing the Museum of Natural Science and Zoological Museum in Parc de la Ciutadella in the Old Town district.

Spain, Catalonia, Barcelona, The Neo-Classical town hall Casa de la Ciutat in Placa de Sant Jaume in the Gothic Quarter with an ornate street light in the foreground.

Spain, Catalonia, Barcelona, The spire and main facade of the Cathedral in the Old Town district.

Spain, Catalonia, Barcelona, Drinking water fountain in Portaferrissa Street off La Rambla in the Gothic Quarter with a tiled depiction of one of the gates to the old walled city.,

Spain, Catalonia, Barcelona, People on the steps below the main facade of the Gothic Cathedral in the Old Town district.

Spain, Catalonia, Barcelona, The spires of the basilica church of Sagrada Familia deisigned by Antoni Gaudi seen through the branches of a tree in the Eixample district.

Spain, Catalonia, Barcelona, Tourists on a bus viewing the basilica church of Sagrada Familia deisigned by Antoni Gaudi in the Eixample district.

Spain, Catalonia, Barcelona, Small shaded square in the Gothic Quarter district planted with trees in leaf for shade.

Spain, Catalonia, Barcelona, The spires of the basilica church of Sagrada Familia deisigned by Antoni Gaudi seen through the branches of a tree in the Eixample district.

Spain, Catalonia, Barcelona, Red Metro sign against a blue sky.

Spain, Catalonia, Barcelona, Tourists viewing the basilica church of Sagrada Familia deisigned by Antoni Gaudi in the Eixample district.

Spain, Catalonia, Barcelona, The spire and main facade of the Cathedral in the Old Town district., 1,

USA, Arizona, Grand Canyon, Aerial view over the Colorado River from a Helicopter.

Spain, Catalonia, Barcelona, People on the steps below the main facade and spire of the Gothic Cathedral with olive tree and palms in the foreground in the Old Town district.

Spain, Catalonia, Barcelona, The main facade and spire of the Cathedral with olive trees and palms in the foreground in the Old Town district.

Spain, Catalonia, Barcelona, The main facade and spire of the Cathedral with olive trees and palms in the foreground in the Old Town district.

Spain, Catalonia, Barcelona, Red and white Bicing public hire bicycles in the Parc de la Ciutadella in the Old Town district.

Spain, Catalonia, Barcelona, Washing hanging from windows of an apartment building in the Gothic Quarter district.

Spain, Catalonia, Barcelona, Apartment balconies in the Eixample district.

Spain, Catalonia, Barcelona, The spires of the basilica church of Sagrada Familia deisigned by Antoni Gaudi seen through the branches of a tree in the Eixample district.

Spain, Catalonia, Barcelona, Tall palm trees against a blue sky in Parc de la Ciutadella in the Old Town district.