From an email I got:

8 Amazing Holes!

These holes are not only amazing, but some of them
are really terrifying - especially #8! The sheer scale
of these holes reminds you of just how tiny you are.

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.

The amount of earth removed by workers is estimated to
total 22.5 million tons.

2. Glory Hole - Monticello Dam, California

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.

The hole can be seen at the top left of the photo above.
If you were to jump in for some reason, your body would
shoot out near the bottom of the dam (below). There is
one person known to have had this experience. She did
not live to tell of it.

3. Bingham Canyon Mine, Utah

This is supposedly the largest man-made
excavation on earth. Extraction began in 1863
and still continues today, the pit increasing in
size constantly. In its current state the hole
is ¾ miles deep and 2.5 miles wide.

4. 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.

At surface level the near perfectly circular hole is ¼
mile wide, and the depth in the middle reaches 145
meters. Obviously the hole is a huge hit with divers.

5. Mirny Diamond Mine, Serbia

I’m pretty sure most people have seen this one.
It’s an absolute beast and holds the title of largest
open diamond mines in the world. At 525 meters
deep, with a top diameter of 1200 meters, there’s
even a no-fly zone above the hole due to a few
helicopters having been sucked in.

The red arrow in the photo above is pointing
to a huge truck.

6. Diavik Mine, Canada

This incredible mine can be found 300km
northeast of Yellowknife in Canada.

The mine is so huge and the area so remote that it has its own
airport with a runway large enough to accommodate a Boeing 737.
It looks equally cool when the surrounding water is frozen.

7. Sinkhole in Guatemala

A sinkhole is caused when water,
usually rainwater or sewage, is
soaked up by the earth on a large
scale, resulting in the ground
collapsing the surface.

These photos are of a sinkhole that occurred
early this year in Guatemala. The hole swallowed
a dozen homes and killed at least 3 people.

Officials blamed the monster of a hole on a
ruptured sewage pipe.

And the really terrifying one?#8

This is the famous ‘Rat Hole’ that you have heard about.
It is capable of swallowing trillions and trillions of U.S.
dollars… Annually! Never to be heard from again.
It makes me tremble & shiver!

PS: Have you started on your taxes yet?
It’s feeding time this month.