i would imagine structures like the burg kalifa in that desert and many other large concrete structure's will remain after a few thousand years, degraded yes, but still there standing like monoliths in a wilderness, striking wonder in a foreign travelers path
Like the Statue of Liberty's arm in Planet of the Apes.
Also, would like to see that pic you posted larger. I didn't realize the Eiffel tower was taller than (the tallest?) a pyramid. Assuming that is a big pyramid and not some starter model.
Plus the pyramid has stones weighing up to 200 tons each. I doubt the Eiffel tower has any pieces that massive. Also, we don't know how they cut them out, sent them down to Giza, lifted them up and fitted them togather with such precision.