A) Morca Cave B) Krubera Cave C) Veryovkina Cave D) Mount Elbrus Cave
A) Georgia B) Ukraine C) Russia D) France
A) 2,212 meters B) 1,980 meters C) 2,300 meters D) 2,050 meters
A) Bulgarian Mountains B) Russia C) Abkhazia, Georgia D) Armenia
A) Volcanic B) Sea Cave C) Limestone D) Ice
A) Phong Nha Cave B) Son Doong Cave C) Hang En Cave D) Ailao Mountain Cave
A) It has its own ecosystem. B) It contains a lake. C) It has many stalactites. D) It is completely dark.
A) Son Doong Cave B) Mammoth Cave C) Luray Caverns D) Waitomo Cave
A) Meteorological phenomena B) Botanical diversity C) Astronomical data D) Geological history |