Ilchulbong tuff cone, Sunrise Peak, island of Jejudo, UNESCO World Heritage Site, South Korea, Asia

Ilchulbong tuff cone, Sunrise Peak, island of Jejudo, UNESCO World Heritage Site, South Korea, Asia

Hot air balloons over the Love Valley at sunrise, Cappadocia, Turkey

Fairy chimneys, Love Valley, Cappadocia, Turkey

Hot air balloons, Goreme National Park, Cappadocia, Central Anatolia Region, Anatolia, Turkey, Asia

Fairy chimneys at sunrise, Goereme, Cappadocia, Turkey

Hot air balloons over the Love Valley, Cappadocia, Turkey

Hot air balloons over the Love Valley at sunrise, Cappadocia, Turkey

The Hverfjall crater, a tephra cone or tuff ring volcano in Northern Iceland. The crater is approximately 1 kilometre in diameter; Skutustadahreppur, Northeastern Region, Iceland

Snorkelers getting ready to enter the water from a snorkelling tour boat operated out of Maui, Hawaii. They are located next to the backwall of Molokini Crater which is a volcanic tuff cone, Maui, Hawaii, United States of America