A 2012 astronaut photo shows the striking beauty of Japan's Aso Caldera, a "supervolcanic" structure home to more than a ...

The lofty mountains and jewel-toned lakes of western Canada are breathtaking. While the dreamlike views enchant, crowds and traffic often pack Alberta’s busy national parks in the summer months.

The majority of rivers start in lofty mountains before flowing down their slopes and ending up in the sea. While that simplistic story explains the route of most rivers, many others have more ...