5 Lubang Paling Menakjubkan di Dunia

1. Kimberley Big Hole, South Africa

2.Glory Hole Monticello Dam, California'

3. Darvaza Gas Crater

4.Chand Baori

5.Sinkhole in Guatamela

sumber:http://terselubung.blogspot.com/2012/07/5-lubang-paling-menakjubkan-di-dunia.html