1. Kimberley Big Hole - South Africa
Apparently the largest ever hand-dug excavation in the world, this 1097 meter deep mine yielded over 3 tons of diamonds before being closed in 1914.
2. Glory Hole - Monticello, CA
A glory hole is used when a dam is at full capacity and water needs to be drained from the reservoir.
This is the 'Glory Hole' at Monticello dam, and it's the largest in the world of this type of spillway, its size enabling it to consume 14,400 cubic feet of water every second.
3. Great Blue Hole , Belize
This incredible geographical phenomenon known as a blue hole is situated 60 miles off the mainland of Belize . There are numerous blue holes around the world, but none as stunning as this one.
4. Sinkhole in Guatemala
These photos are of a sinkhole that occurred early this year in Guatemala . The hole swallowed 2 dozen homes and killed at least 3 people.
5. And the really terrifying one!
Never to be heard from again.
It is reputed to be full of at least 535 idiots.