For raid seven, I was originally planning on doing something more complex than this, but then I remembered that I suck at Minecraft and couldn't do something that cool. So, I figured the Eiffel tower could be done fairly easily.
I used the stone which I sort of regret using because it didn't look great at the end, but it was alright.
I had some issues measuring the blocks out, but once I counted it out and got the scaling right it went fairly smoothly.
I started adding glass blocks in between the stone for the observation decks.
I eventually started thinning out the structure and making it increasingly taller.
I made another observation tower to add more depth.
This is the final product. It took about 3 hours altogether which was about what I was anticipating. I wish I used a better matching block to look more comparable to the real Eiffel tower, but for my Minecraft skills I think it came out halfway decent.