Index and credits:
1. NASA satellite image shows Iceland. (AFP Photo Handout-NASA)
2. Air Force One’s shadow is seen as on a frozen Lake Erie as it transports US President Barack Obama to Cleveland-Hopkins International Airport. (Brendan Smialowski / Getty Images)
3. A train passes through a tunnel in the rocks as people walk the foot-path “El Caminito del Rey” (King’s little path) a narrow walkway hanging and carved on the steep walls of a defile in Ardales near Malaga (AFP Photo / Jorge Guerrero)
4. An Iranian woman walks past a wall in Tehran. (Behrouz Mehri / Getty Images)
5. An Indian widow dances as they celebrate Holi or “festival of colors” in Vrindavan (Roberto Schmidt / AFP / Getty Images)
6. The Villarrica volcano, near Villarrica in southern Chile, shows some activity. (Martin Bernetti / AFP / Getty Images)
