Say you bought some land that has a Mountain on it. Say you decided to dig into the mountain.. Not for precious gems. Not for metals nor irrigation.. Simply for the sake of Art. Something that could still be seen from the air.. Thousands, if not Hundreds of Thousands of years after you die... Could you come up with a design?

And of course I’m thinking about the Nazca Lines

I saw an episode of Expedition Unknown about Nazca Lines.
Interesting.

I would carve a giant smiley, design shown here: ;o)

Accretion discs, seeing it from space or seeing it on the broadside of a mountain would be awesome.

Though I could do one better with architecture and seeing it from space would include a bridge over a round lake, and around that lake is a round highway that goes around the lake in a circle, a lake-roundabout, that includes off ramps and on ramps to the bridge-way at the inside-most lane, with similar at the edge lanes.

With enough drivers like Los Angeles traffic, the lights from the cars, bridge, and roundabout would create the illusion of an accretion disc!

The American Flag.

nope, im not that creative lol,