As Engineers and Surveyors, we’re always fascinated with engineering and natural marvels. This series of images makes you take notice of really BIG HOLES!
Really Big Hole #1 - Kimberley Big Hole, South Africa
Apparently, this is the largest ever hand-dug excavation in the world. It’s a 1,097 meter deep mine that yielded over three tons of diamonds before being closed. That’s a lot of bling!

Big Holes - Kimberley - South Africa
Really Big Hole #2 - Glory Hole, Monticello Dam, California
This is the largest in the world of this type of spillway. Its size enabling it to consume 14,400 cubic feet of water every second. A glory hole is used when a dam is at full capacity and water needs to be drained from the reservoir.

Big Holes - Monticello Dam, California
Really Big Hole #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.

Big Holes - Blue Hole Belize
Really Big Hole #4 – Sinkhole, Guatemala
This photo is of a sinkhole that occurred February 2007 in Guatemala. It swallowed two dozen homes and killed at least three people.

Big Holes - Sink Hole, Guatamala
Really Big Hole #5 – Rat Hole, Canberra
This financial sink hole is capable of swallowing millions of dollars of tax payers’ money annually, never to be seen again! It is reputed to contain at least 226 ___holes of another kind.

Big Rat Hole - Parliament House, Canberra, Australia
At Donovan Associates, we take your structural and civil engineering and surveying projects seriously, but also take the time from time to time to enjoy a good laugh as well as reflect on interesting and intriguing phenomena and projects like these.