Alright I found a method that is a lot less timeconsuming. You'll only need 6 bamboo, which can be found in a "Bamboo Jungle" inside a regular jungle. If you're struggling to find one like I was, start up a new world select Jungle Temple as a seed option. This way you'll spawn in near a jungle temple which will likely have bamboo in the chest as well as string from the tripwire.
Gather at least 3 stacks of dirt, and head to the highest point near you. Then start building up with dirt. The max height is Y:256. When I got close, I placed scaffolding as the last few blocks to get to max. Around a minute later, the cheevo popped. I did break some scaffolding and replace it a couple of times, idk if this is necessary.
You should be standing on a scaffolding with the Y coordinate being 256.
Lemme know if you have any problems