3. Cycling on the edge of clouds in Salar de Uyuni, Bolivia, the largest salt flat in the world.
5. Stuðlagil Canyon, Iceland These huge basalt pillars are believed to be more than 2 million years old, a remnant of the ice age.
7. Meteora Monasteries, Greece
10. The Door to Hell, Turkmenistan In 1971, Soviet scientists ignited a crater to prevent the spread of methane gas, anticipating it would burn for only a few days. The fire has persisted for over 53 years.
12. There's a place in Iceland where green fields, a yellow river, a black beach and the ocean meet.
13. Black sand beaches are actually very common in Iceland due to the volcanic activity on the island.