I think this counts as a man made marvel.

[Wurm]

http://ueba.net/hosted_pages/Moving-a-Boat-20060813

:0 :thumbs:

 

[Wombat]

Very cool, thanks!

 

[smokelaw1]

Super cool!

 

[Jeff B.]

Wow what a machine! That's pretty cool.

 

[JimD]

Boy thats really a feat of engineering.

 

[Starburn]

Cool. Where is that?

 

[iluvmysh]

WOW, that thing is ginormous.

 

[Infinity]

Yes, where is that? - Amazing!

They obviously worked out the costing and decided transporting would be
less expensive than constructing a lock or locks.

Brian