In Mars, not only the huge of the creation is important, but the detail and the material is also important too. Take a look at these Picture
Stamped Dome
A 250 m dome with artistic sand alike cover
A 609 meters silver like casting dome
See how detailed it is
Here is another sand alike detailed surface carving
20 kilometers paint drop over smooth surface
400 kilometers roots of Aluminium like casting
Looks closer
Mr. Wonka's Chocolate Factory
Mr.Wonka's Choco Bar, a 300mx500m bite each
And finally...this one will be the motivation to go to the Mars
The 16 Kilometers Mount of Gold