Places around the world that exist at the extreme end of the spectrum.
Mount Etna looms large over daily life in Sicily.
Scientists are warning about the consequences of vast swathes of ground thawing in Siberia.
A large crater in Siberia's permafrost gives intriguing insights into the past.
The historic German city that has a history from outer space.
The surprising repository of ancient ice at the heart of the study of climate change.
The Czech mining town Jachymov is home to the most important discovery in the field of radioactivity.
Why does this town rank first in Japanese women's longevity?
BEST OF 2019: The Veryovkina cave is the deepest cave in the world, with a record depth of 2,212 metres.
Each autumn, around 3,000 families in Kyrgyzstan move into the forest for the world's most unique harvest.
People living at the foot of a volcano in Ecuador are being prepared in case it erupts.
Two families have been guarding Europe's oldest lake's secret for generations
A small cafe in the Azores provides a vital mail service for sailors crossing the Atlantic ocean.
Often shrouded in mist, Lake Mashu is the clearest lake in Japan and seeing its surface is said to seal your fate