Your Favorite AH Megaproject/Wonder of the World

Talk about it here, and why it's so awesome.

Right now, my favorite is the Red Curtain from Resistance: Fall of Man. In this TL, Tsar Nicholas II adbicated his throne in 1917 and gave it to his his brother Mikhail, and under his leadership Russia managed to escape Bolshevism. However, Russia lost a sizable chunk of western territory to Germany in the peace treaty negotiated shortly afterwards, and Mikhail's rule was threatened by any number of revolts and peasant/socialist uprisings in the following years. Finally, in 1921, Mikhail takes the unprecedented step of withdrawing Russia from international affairs and beginning the construction of an immense set of fortifications along Russia's western frontier. Running the length of Russia's border (pretty much OTL's Russian border) from the Baltic to the Black Sea, it's even longer that the Great Wall, and it was built by a society ravaged by war that only has a substandard level of industrialization. How impressive is that!
 
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I tend to like large bridges, like Bering Bridge.
Likewise Boreal Express (luxurious train from St. Petersburg to Montreal) is cool.

Both are awesome feats of practical engineering of early XX century and they implicate stable political situation in North Asia/America.
 
I'm going with the Great Wall of Berlin in the alternate Berlin of Fatherland. Just imagine that: a giant wall with the names of every German killed in both World Wars.
 
That's not a wall but something like the Arc de Triomphe (only several times bigger - one wonders what Hitler had to compensate).
 

Alcuin

Banned
How about the colossal Coca Cola logo DD Harriman carved (for an undisclosed sum) on the face of the moon so that Coca Cola would forever be visible in the night sky?
 

ninebucks

Banned
The huge trans-Bering bridge that was built by the Soviet Union which inherited Alaska. Such a TL would also probably feature a Palace of the Soviets.
 
Vacuum tunnel for a maglev train, I have read about those in old books. back in the 1950's and 1960's they though by how we would have flaying cars, colonies on mars and "Vacuum tunnel for a maglev train" The idea of getting anywhere in the world in a half a hour has advantages.
 
The Atlantropa project: dam the straits of Gibraltar and turn the whole Mediterranean into an enormous hydroelectric power plant. Talk about scale!
 
The Atlantropa project: dam the straits of Gibraltar and turn the whole Mediterranean into an enormous hydroelectric power plant. Talk about scale!

Yes! Atlantropa!

I once read that the Congo-Lake this architect planned, too, would have had a comparable effect on global climate as the greenhouse effect...
 

ninebucks

Banned
The Atlantropa project: dam the straits of Gibraltar and turn the whole Mediterranean into an enormous hydroelectric power plant. Talk about scale!

Wow... I'll think about including that in my Future History. One question though, where does the Mediterranean water go in order for the sea level to lower?
 
Wow... I'll think about including that in my Future History. One question though, where does the Mediterranean water go in order for the sea level to lower?

The Med's water balance is negative. It loses more to evaporation than it gains through its river systems. AS it is, it only stays level by drawing water from the Atlantic, which is why you have a pretty strong current in the Straits. I don't actually think you'd need to dam it - putting in the underwater equivalent of wind farms would be enough - but a dam would just be ever so cool.
 
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