What do you think is the greatest feat of human engineering ever made?

Harnessing the power of the atom and developing the Nuclear Bomb, and Nuclear energy. Not saying the bomb was a good thing, but it has forever changed the world.

The Panama Canal is more of a construction feat rather than an engineering feat. The pyramids are in the same category.

Now do you mean great in terms of benefit to mankind or just very complex and difficult?

In terms of benefit to mankind, the electronic computer may well be the greatest but it still has a way to go.

In terms of complexity or difficulty the I would go with the space program. Not just any one item like the moon landing but the total program because each step is built on the previous steps.

Communication Network .

By asking this question on Yahoo Answers you have instantly Communicated with Millions of people you do not know !

With the personal cell phone, Any Other Person, on the Planet Earth or from outer space; can telephone your cell 24/7 !

Large Hadron Collider

Slarty Bartfarst's version of the Fjords in Norway, so much better than the originals.

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The pyramids.

No beads, no theodolites, and no Cad draughting.

No email to confer with architects.

No engineers to say "this part isn't strong enough"

Modern masterpiece, well ahead of its time.

Nothing any modern civilised society has done. How about building the pyramids or stonehenge or Maccu Piccu?

Putting men on the moon.

cars

it is NOT the Pyramids! that was the Aliens