BEST OF 2019: The Veryovkina Cave is the deepest known cave on Earth ... the world's oldest human processed gold, dating back 6,500 years. Nasa has released new 'sonifications' of the Universe ...
It is honeycombed with 34 miles (55km) of tunnels constructed over 200 years. The Travel Show's Christa Larwood takes a tour and visits the more recently discovered "stay behind" cave created ...