Elephant carrying tourists on its back in the Reu river. Royal Chitwan National Park, the Terai, Nepal

A woman looks out across the hills of Catalonia from a rock ledge near the village of Siuarana, near Reus and Barcelona, Catalonia, Spain, Europe

A woman tackles a very difficult climb on limestone cliffs near Siuarana, a medieval village near Reus and Barcelona, Catalonia, Spain, Europe

A woman climbing on limestone cliffs near Siurana, a medieval village near Reus and Barcelona, Catalonia, Spain, Europe

A woman looks out across the hills of Catalonia from a rock ledge near the village of Siuarana, near Reus and Barcelona, Catalonia, Spain, Europe

A woman climbing on limestone cliffs near Siurana, a village near Reus and Barcelona, Catalonia, Spain, Europe

View across the limestone ravine beaneath the medieval village of Siurana, near Reus and Barcelona, Catalonia, Spain, Europe

M31, Andromeda Galaxy, Composite