Stonehenge

Stonehenge is a growing build near the origin point of the world made up entirely of nether portals, thanks to the origin portal spawning a new portal in the build, based on the location of other portal frames. It was completely demolished down to an obsidian platform by H1jackminecraft and Zyon134 in early December 2020.

The method of building Stonehenge can be done with one person, but is faster with two. Have a player go through (or throw an item through) the frameless portal, return to the overworld, and break the frame (but not completely), then repeat. Although it is a monument, Stonehenge (after it was rebuilt) is the one structure that people are allowed to destroy, as it functions as an infinite obsidian generator.