Venetsa Cave in Bulgaria
Schlüsselwörter
cave,
beautiful,
colourful,
illuminated,
semi-precious,
onyx,
stone,
colourful,
colours,
colours,
stalactite,
stalagmite,
light,
different,
high-coloured,
bulgaria,
beauty,
nature,
geology,
limestone,
mountain,
rock,
underground,
stone,
material,
deep,
extreme,
national landmark,
tour tourism,
travel,
structure,
lighted,
inside
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