1. Darvaza Gas Crater-Turkmenistan
2. Kimberley Diamond Mine-South Africa
3. Monticello Dam-California
4. Bingham Canyon Mine-Utah
5. Great Blue Hole-Belize
6. Mirny Diamond Mine-Siberia
7. Diavik Mine-Canada
8. Sinkhole-Guatemala
Sumber
Arranged By : DelapanDlapan
