Wonder Cave (Kromdraai, Gauteng)
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The Wonder Cave, in Kromdraai, Gauteng, South Africa, is the third-largest cave chamber in the country, and is believed to be about 2.2 billion years old. The single chamber has an area of 46000 square metres, and is 125 metres long and 154 metres wide.
The cave has about 14 stalactite and stalagmite formations up to 15 metres high, 85% of which are still growing. The 60 metre deep cave is accessible to visitors by elevator, and is located within the Rhino and Lion Nature Reserve, in the Cradle of Humankind, a World Heritage Site.