Lake Baikal, at the start of the Angara River, Irkutsk, Siberia, Russia, 1980s. Baikal is the largest freshwater lake in Asia ...

What attracts them is Boybuloq - at 1,415 metres (4,640 feet) - Asia's deepest cave ... Vadim Loginov says they have found new rivers and lakes inside the cave. "An inexperienced person won ...

Lake Baikal, the world's deepest, offers astounding views along its shoreline - and winter tours of its frozen expanse have become increasingly popular. With some trepidation, Oleg Boldyrev walked ...